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 0xc39834a5e9cc86b016ecc28d0d3df13c4c5ead5c69553a0d78c462127e799933. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd4028bb-13f7-4141-9eb1-c71a33dc1f20.json and https://artists.proofprofile.net/proofs/artist/bd4028bb-13f7-4141-9eb1-c71a33dc1f20.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 0x12d2366a93cd25c4064bbac421cb663dd0dd6ac2519176f580563562c6951066. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:54Z), 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/USCGJ2343055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53181285e23eab29d500e05b66a60d41d64d6977390adae8f3d55cb36f0069fc. 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/USHM92075188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428fe228f5dafc7eb6e3042c364224da6af2f3a9fd96c1ef7c80147e8234a271. 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/USHM92075189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95bce815cecc85377f7182ebcc944325c1d0667afb7ba0acde293bcbe9c10bb. 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/USHM92075191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a85e00f25f64462626e1a5b7bec6a1a8d8584fe274d9fed7a210d04cbd799. 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/USHM92075192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5add8319c3796deb761a63f54e447cd9ad2949b827ef20a23b1d965a7f074e. 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/USHM92075199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aa9b87427d10dcede98e399c3a910a80d6003b85b92eb6ab650e79ec45c1f5. 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/USHM92075200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4cc5a33c7c5eb7243b9cb21508f8fc71fec138cbe95c0fda4d656204a8b90e. 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/USHM92075201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f07f1ade94aa94a4c73cf6abf74135c789d5d8f4d99a7ad5fe53e94f5926994. 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/USHM92075205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f28a6446e47d9e8778d0139ded807399aa183133e29763057bd9b12a8625ff. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:32:32Z), 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/USHM92075190.
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 0xf5432a5dc607d47f4b55ce43ca4787c0052ef22a6bd1c5ceb12d4c2cc9c5b6d5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM92075193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942a1aa40278cefbda2ce2c4a43ecea5960b7e78edfa348c3d830daf67b011da. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHM92075194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e4928465fcac2723e21b0c65e5ba8be251a8de50382027d6347aaa0650211. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USHM92075195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74739fc70fec65290178119ee7da0f1a7fcd64f310a707fdfc7fb79615c90058. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM92075196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75344cf62a82a9f46892d0d263c4469c3722e79ba2d917608002a1b8e9c1b5ec. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM92075197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7947c5ebeeb5f726f2a6cfddebcbbfec707922d66c800826a069a2aa4c5c75b. 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/USHM92075198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175b69ac9db11f85cd9b9865b6d09d8f0ad9908b329714b40705a3d3e4fbf203. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM92075202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2248a1ba55608470b2887ac19f38904254847e0964ecb7d38d120895d8263c4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USHM92075203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9becee03e5ab8293f658cbf9bf9b7a3ceed9dfa12681dcfbd7104c88864646. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM92075204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6cfe2eb28e0c4f38538962aca4326bfaf9c494906d6766359557cf31ffad9b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USHM92067603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ee4e3ec7cc261fce19b997c8716ad9c3d6a65968687fa2f3902a5aa9e4bc89. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USCGJ2302727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fb2bf45e42257cb68954ce46c90780e7ec10edd54908289f935850015e4b94. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USDY42323762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3f4e4ac0235978386576355a5e11d07f308f684fa57ec2a108a16c9bc5c2df. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDY42323764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b82ff5eec66b3477bd7fb856ce54a2b6f8b0554edbc73bbf664d23bd742d1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USCGJ2302717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389127e9b393d752e413d209e21a4f6b119dde0e5013061f9bfa3e7f909b1008. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6P41750799.