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 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 0x000506b6cd0d2b30c58d1799729d9d8857a3974151d018659e8b7c104e22925b. 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/3e2c0911-c05b-4c35-a2df-362d75b9ca99.json and https://artists.proofprofile.net/proofs/artist/3e2c0911-c05b-4c35-a2df-362d75b9ca99.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 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 0x6def6bcc0869d018eecd30ffff22ae6b8aabd9fe697e0b896d29ea042b045363. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCACI1551741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7605fcce0955162b4616daeee30cec1e1e27cb28bed2cc461ebe9c699a69ab1. 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/TCACA1466868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015bd0730982bcc4fa74faf9b5312275d53d21e02fbad7281489b6a44d2481f5. 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/TCABT1491068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67afc8773e04f5cbf91a515fab7cc7465b3eb9365e1d29061e6c8dba1ebf596a. 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/TCACA1466878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8727aa6045c40888aa2f0bf3863aed86d21e62b44f2eaba291c06b82624ee288. 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/TCACA1466879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99a17eaaa21d7bd5a6def3c396d739b8e73d74c0d94a4faad011bb0e3cc5ed8. 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/TCACA1466880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d24eeaafa569f11c8736513aba129f149b17639af661dbdf2214129ef881e95. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCACA1466881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015bd0730982bcc4fa74faf9b5312275d53d21e02fbad7281489b6a44d2481f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCABT1491068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243656d2dbda6797b6a98b540e1d6fe983577b744a1832e3982b44cad45a572f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NZAM02400984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe913d7ccd4aa477f7450821d406ead501df69c667acf58dab0eec36616d17a6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZAM02001487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0032833a5db01e5a3390707d98bb6fb7e9e2117a6de7ce999b3cb8a25c9a18. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZAM02002188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6bd631ff85e4dd39ca6c174af6373b9bfbbadf109513ede3e8b8def32c493f. 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/NZAM02400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06d7ab93deb86ca3e2b104a71e8faeacc77e42506d8a1132aa668dce10ef93. 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/NZAM02301109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bb694fb5c0532d391eb2ddb013bfeef59a6d6691bda89c27613212bb8d81f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZAM02100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836a4720b0558c940247afe30fb2bc32fb217b166638a9dd420769603e06a4e1. 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/NZAM02300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce7c9cf23b174fd8d9d0b5ce2b3224e026588ad2c5e9d42565ddef29ca346fa. 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/NZAM02400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551bf0d2b40629b9d2395731ee36da0b9ec9382c4cf7010edcef14cc70c88ea1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZAM02003157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f005bb700de5d30c5fad3123b4ffc7ff2c6322a9fa5dd29a22f2ceed8bc8b38. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NZAM02400983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3572fb36b684a86561f29aaed1ad3c735c5913054dc8b5fac94cb8f7ccf1953. 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/NZRI11701878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d367a6acda770a8dd48a6f8b3a0e974402648cfc1263428c73b3bc353d9bc4a. 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/NZRI11701615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ec2fcc54cb3b420151985be2d1fcd8669e10e96c4cc80f0e27e428e5ff9a53. 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/NZRI11701611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6b15b1063ef1e2ede846073245c0a38258686b1c0cf09ba5156993a65720e. 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/NZRI11701610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff1b1e8661de3e8598269e472067aa09f3e0cddddd21d4695b51a8b6205e243. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NZRI11701616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12e8748227cdf3bfaee85268bfa40234ca4b58ddf14ea704a93ea5f8a86713e. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/NZRI11701614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117fe7615225c074d32c7539502eba29d1cfa9a5c664430b677bcf36d9f35e69. 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/NZRI11701613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a944a171fa54e062a6340482c2a106e98fc51859f8689e722fd1113a76271b6. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/NZRI11701877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ff30f42274d238c8a100650424a3640135615e24f060e15a1605dc5e6439c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NZRI11701617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d42cd7dd53825e6755392fd5703e2d27a7ef2dcd52fe01b32414d0776d5a5cd. 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/NZRI11701618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1d4b27749b8eadafdba3acb966006ffdb1cacef45f3214e34beecfe3b47e16. 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/NZRI11701619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf420907a044e5ce48f95aea23e2441ef8e35e7082b5c4ab650a1f812e28abc4. 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/NZRI11701612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8323fb3758795b25d346f6cbc9cc09b7a4684caac3840e021c04d811fb82cd. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/NZAM01801580.