1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a07fc2dbb305ebda75ac99effff372e658a7de8b851474a32eed016498b484. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bc7edb4-48d8-4690-92f8-c2f77451a482.json and https://artists.proofprofile.net/proofs/artist/0bc7edb4-48d8-4690-92f8-c2f77451a482.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9290100d7ccd5e322a65302aca0a5185dc716e1776580a590f043c36b08eab68. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES75E2401042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666c61bc888eb3909236735dcdc538bde4e7e6324a996502f1be1d33d1f09733. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2128701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84441f0ecbdb86b9192fca666dd54633f5b325156bf1d1c84d80d37bd3b9674. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2254570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766ae8fb93b7e6cb89165a11d47264a99eb17c6b85ea031e3d0b3eee4c4c5a2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2254571.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c660c1c4ed4bc15edc8d1cf046309b218053ef46b61a66658bfebffc3c67856. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2254573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983b7e164ccc86bd5abc577732f030ec739ffff1ca22da8f4c82dc1f8d8a970. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82053501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17463059bdeb69dd736239d83d1c97544a20de948e646e853ad55fef0fb4ec04. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92334881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1e6cbd9b39785c728288570e3cc42c41b11d12eb7cffc27510c7f8e04d6243. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92334882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880d2d2161a745a3c5e32b71d6f29b4c08d25db034f8439e86d8817c730880d4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2343944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12db0403c9321ae832f3c409cc3244579d7c28f9b03d99ec5c204f7d0d9fdd8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2499668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018c8aa97506e279375d5fd3926f816f52457e9dcd4a1573ede504ad9c23c183. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2446854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf410a973a242e4d792a71c10d3989d46396bf63644e2e4d2d802e48af0b4b3e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE66N2262335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f67cf3f8cae7a13ffe613dba4e41ef9e4427baec2c43e156eeafa891511269c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2277704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad87fb49275c1ee09a84f81af2c5921d6aa2e914d061a751d04b04607a9fa7a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6M2282491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa964c9185a3ed4ffd2ce09d2269bed2c6616b016a7553a1949f9c2451af4e68e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32204869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873e95a63026c5d07c1006c98b779ea5e5869a24c136d8ead54171caec54837d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2108193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41ba03c2e600ae6ca12102a2081afae7aa4d9a674027b9782fd08b365c3565c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82113804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac04613c463f53ed856464ac93682e757481708e88bbbd4bca839670b203a8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2126064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acf49279386f9ee2f31857c9b5fd568ef050d08825a8dbeef727209236eb6b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22069518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8682d0633c7614a6f0857c414094580bd26153d38b361096d6a06f4f2d1de9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2065950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9fec1e93b8f4d74a27daa937766bc1fbf6f365dc9f58dfd0d874ca3fed024a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2092703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b81ed3e82d62066af379bbe38cb7982082bfb027f1b1d0630665c4c961a259. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6675180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a4d7232d88002ee47dcbf354a454f33fa0c43f3fa2f9eb8364e8a43d70aa37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32174383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b52600541b453ae34cdd92ee5f221b1c6fccdc137b29988ddc57f0cf5dec80. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2341939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6968377c027db15384a8106bd894a143cc3ee6d1ac164723e48c81fda3509. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2317734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3406a15dfed60c9e10103c4e630fe393f1c03f3d6407a54eb92de9bf2aa7b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZOPM2239800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0ac82841ee6e9b9a65b35f49c4955f2eb14ad229c44f6186a7b33a5d459e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2302021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1219a0521a352bb4d6f626b1822819df12ce36d1779fd59c2332429c5d2b6996. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2315564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0541ea146cad69119850ad6cb9d39e50effbc141ea2603698ffd0124ad071e60. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2307271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eec4568113492e939ca9f2981411262278265b987d7752991e615b90c44c36a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2311936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6256c7b22de474f6a1930de194c515d4ae96e6f43475bde86d6a0c64512ffe96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2317738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff11bf27dc6e394bfe50015167aa07e5480c98f530fb90256dba693bef84669. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2317736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71adc496adf537865caa989d6cba3a816caaddf0f78d5f4f9db726e7632022f7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92358223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257927b21d49025ec68664b0ddcb85675738d35b4c18ea1e98d9345ff7cf8452. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92358224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d3a71c8075003985441d22ee051779b86e4720c6cb38333d1694421d7760c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92358220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180c4b2297efb681338d2aa5e4020ee22d7d9096904437f45cb89a80309efd9d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92358225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a52236c67a3e9a37d7318b9939c9316b0ce10f02e3c61a76c418e7dbbef8d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92358222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce12971ecee6e2f5c9edfc93b9ad94b8728e7dc9a4b42e7c7889cb0ff0b7e596. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6675203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b7d4c7cd9112b52e532c186ac9c63bff6259476d2e71b2142c115f7e599193. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2444167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60654b2f9c1ca9d654e2217142672d23c79251ce8a409ddcd24480580672dcc5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2390030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985070dc0220ea356a12931494ac2037fc032bd1d065ca413f5ceba4866c3965. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2239143.