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 0xbd3c9a0dacec6c49cad0f8e255d352c7f65866466d0e35ac37055a266f6979b0. 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/cd36a406-6127-4188-bcec-1190ba8e22b6.json and https://artists.proofprofile.net/proofs/artist/cd36a406-6127-4188-bcec-1190ba8e22b6.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 0x881b4ad8f2061a97a3cbe2df4593f4cb4a60e991a492a0c5fb8d6a58f481205a. 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/QZES61898870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63266eebcca0b97a90eaf45aa58ec39f84b6f1afe6c45f592462f1af6832eeef. 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/QZBRF1891388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bc55176bdbb610a12a0cc32c9a713ccfff3d544d49c1e90619938dfc972e34. 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/QZCE61848433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb18485df71fec32eac25f95143baa45d3d365fd26bc9c1e0d84529b69777c67. 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/QMPKX1841546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b4ad8f2061a97a3cbe2df4593f4cb4a60e991a492a0c5fb8d6a58f481205a. 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/QZES61898870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802c69a4586e3846139ab7fdceae9922a80d8fe8d5195f43e8780d3153839899. 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/FR9Z61800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711e7409e9174927ad2e2a10d97454b4d56b0a47dacff83c7e17c6874d32a461. 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/FR9Z61800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0a46e3c3654e6945a47a599f1b677a7582a7bce6a1fc032bc1990edcc7a7e5. 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/FR9Z61800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d6220d0eb308d3639d26e7bdfa750d2e6d0862207da1c6de367604a8b6d9fc. 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/FR9Z61800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49c44a8e7dfe676937578556bcf9ccb5f7779a2e996403c0dcf08a767beae6c. 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/FR9Z61800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a08bd73a4557f2d5b1e6d7947fb347bef55768e0b608507fc3dd46b14190f. 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/QZBRF1829365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb050a6aab54fd78ffc022c69b3e7573627c60d96f1aa3b992a23feefc899e0e. 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/QZBRF1829367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78811022f7075f53bb34e3257843ceca250c62904dff20525c988fd5899b0f2. 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/QZBRF1829369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ddf99712b06234131d676db811dc3ca94e49acd9607a84403eb20d72c13047. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZBRF1829370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8710ad0f6f4000065aaf4b1dbd37340f7acac1a990a4a4ef7a8bc2fcd41bb5. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US3DF2243015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25cb93685ff5fd42661150a622193551e25b14648447ff1140f4ed0f96a905b. 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/US3DF2239866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae12af98c9d1688c5df0b08f94e581a498fb8645cfe0462dcdc136a55b1f5b0. 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/QM3DF2142732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34374be8b63b0b546d126da5a9f12d019ca3240f955e8d482f049863f3348720. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2169804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc58402c73485f3bc536adda11a50dda6f428dbefc0e19a4a97834d971c72973. 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/USANG2166465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717aca6fe47fb0c9012378af525882ed26627963cd8d4ecab148ed8555c3f15f. 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/QZK6J2037909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805451078160d79aac1950ef7b1700746fc6ce13ecc64854b6332500b19c4b17. 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/QM24S2006203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0580bd1c72e5ecf554e802f47b1a1b24cbdef2438ee0dc1a3500d5d9716934c. 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/USANG2057923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf381a29938f4841e2cb4de945bb7f72f916e0b055af6f295df56503653372117. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USANG2001190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedf67173692c7dd0e8d7c9a16482f7dad685d78fb63079d5f9c2fcb51155d97. 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/QZK6P1931536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65abaad3a833d9fe0a194dcd6561cdd142d484bea5857b8dbd641879f3d47e72. 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/QZHNA1913076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa071612bc6cefd4c1d5cfeef6daae4723ec6b73d92b7ba1f236c0c0bb94b25a8. 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/QZHN91965264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81161c281b2acdf826f69df85c6e44b83e2871fd0da6f228d45406b6321a983e. 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/QM24S1916301.