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 0x0d957c043963f2102d4b2201bb1276bd89ac3ee28e586d93713e3f49e24d73ac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c5d1750-5e24-4deb-a2be-a8a0bd80815b.json and https://artists.proofprofile.net/proofs/artist/2c5d1750-5e24-4deb-a2be-a8a0bd80815b.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 0xb99570bb0ec9cf39d7bb90f858aae1512d3c9484cc6eda473e876a939b2060be. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BXQ5I2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7871a92897f12db688c5c721e708e847da81c04b3476fa5865ad4be55ce038d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BXQ5I2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da958ced98a9796f972461ee55eabe59bd365b059da14ed13842a503321da86. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:35:12Z), 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/BXQ5I2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7011bf41fe2f8089058da049b9192f8ad8c8f290716ed3339088eab626ef891f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BXQ5I2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd4f46e8db1ebb6679c059f312a8a609351a1826bdf17c4371dcae3e7eae3f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXQ5I2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909605c8b64529db39fca94501ce44bfa46122a709daa6ca4ac1dd4d65ec0b6c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/BK5HA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f994cd14cc9ccdb22d1b7bdadd3e23e8bc5604b6a9822623189d2094ca99b52. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9L2499403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c20ddc3ce56bde6cccf84e90e3f2f766bbd63fac56cf34f478c9a672d6045b6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:41Z), 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/US7VG2548141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74427487eda8cccd0b4f5037fcf6132f1518da974f5532b8bcede30adf51cbf0. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/BXQ5I2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d745effa45af910de4eb2f95d67e8019b5bbe61acbd4c6fc48a16a5e53a4e9d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BXQ5I2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c971fd47a09aa62ab9eed6a86b9682da227acd8d036ae5181e7f553afd530f2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:36:52Z), 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/BXQ5I2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb395cc1736336460afa7664fba379d9d9f3df67916714f74a07ba6b6d8c9b131. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/BXQ5I2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08287770b70e1f863fda3a51c17791836cd0674945211ebd864aef820def07f0. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/BXQ5I2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f506af7bcd2982d228f340925c1974c65566b516efe74f2dac185b51c08963b. 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/BXW6U2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22ca35f5ca5412b971f768b4f60796cb02153968d44214da29ae570f3b6670f. 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/BX49O2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb78983163555043dc4d9a2af110f2b4d554d2b67a518d8d9bb4f8f69feb263. 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/BXPC12100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b37a2eaa7f095d3e941dbfda03c0c22be205bf6a2a0c564af9ed84f90826b4. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BX81V2100015.
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