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 0x6b5891f3e03f0e05059ec94d8385ca50d240ec03786a79a1a738bfc97ea54dbc. 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/ce7a7608-1398-487d-9771-c76218e374f4.json and https://artists.proofprofile.net/proofs/artist/ce7a7608-1398-487d-9771-c76218e374f4.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 0x515c5258795684ebb4d144899d2a9d010ec3fe95f5ee3111e254ad5e8d03ddb7. 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/ROGRA2400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a3062bf5b3a062150e8600cac43b60852a1b9a2ea81041c8077652c4627990. 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/GBKQU2290598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a0b7f6d5cfe07329cab84026ce0b80a3c86a265c8ce9b923621d28c941472a. 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/ITA061302833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ef9e40e18fe60004e540cb46350a9b3b2a01da45cc9ad86bd18f20cc9c1aee. 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/GBLV62422968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6078fca09e0340ca77f60519a428ded570e6976c31bd7146d1801ac673122bb1. 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/GBLV62422969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb00e57d0f3a106d60e1174af21ca127f406d2915221118506cd2d8601d569. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2472189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb497ddb6bb73aafa3af98c62572e82aab49fe99d50030cf8008c6abdea7e4ab1. 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/GBKQU2455988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e608818cc7a1cf178dfa5bda3b98a5d94ab781dcd51b74ad02d87114e95467a. 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/GBKQU2450319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e58879ccb6383ae98069fe5e2eec1c36bd23b96f304d5bbd66fe79cbd571557. 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/GBKQU2450320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c0927448c5bed158f36a54343d9de73d8ec051e3edbeed0e274ab1e2c115a8. 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/GBKQU2437051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59df417eeec60a82e1b77b2b85d12b68e805c21256db661090fccfdeef8469b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2422942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffca241fde0f69ebe4516e490417a631008b531c9d33b40608bb82284b8e005. 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/GBKQU2422943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aa260fc55de263f88d0988e6fba1f24a54cc03dd5a86829b542a946750cebc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62317533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd2ac11fc4ccdd903728aa383f8b626fcd5d8fe396605b3661d5f8a57b6d852. 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/GBKQU2327526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2207884ca0205865153b80ed420df5b8a6b6b446dbd8edf24a60090f6afd9ac3. 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/DEL022380006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f92f355c97f64f6fd1bc6886a8611f360289842a588f55e0c0ddb43f2c3dff. 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/DEL022380010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d52d5917ec37279f8d83ce7f7ee5052f8cceb5064ef894499bc095082d4b4f. 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/QZWDE2221911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94821ee5a2f482cd4e7dc5c95b640ed9c2d63747f5c23e19e01f6fc530b5d8. 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/QZWDE2221918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5868de60af3c7d1ddb812f7b6ea55dd505f029fb8ea1b1fe99a591b0f6c6145. 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/GRMT12201082.