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 0x83dd58cd0a81756c4dd66bde7dac1dfb5555e91e14e847b1a4d9214e511e5add. 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/a166d82b-eb03-435f-93ec-d16339dba31e.json and https://artists.proofprofile.net/proofs/artist/a166d82b-eb03-435f-93ec-d16339dba31e.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 0xe8f361b647d3efc53d6171ac25f14e4d6ea3d83bdc8ba8bd96bd34cf016f7b65. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCJPK2066975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b82e733c60e113fefd79d20591ce49c9f29759aee8369e126eb6c79fdbda6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCJPR2201394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e15ec7cd4b926e0aedfcfad62009daa7c3376b106fdc1cf92e1bf1fd956bc18. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPR2234474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa94afd99352e3510b650e5d8e76c7d83e70234faf1c5e1b6c14e8189f61a15. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPR2284732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c98d94047fcfda5e44af80bc1b0d19fcd5aec48f4b5f7508acfc6351dbf60. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPS2294184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aba17948f92c02fc1128e66101f4ff9d124cf3537f4c8b75c51bd4b8037809. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPS2294166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c884b712dff0a078b659fd173ab91d04d74248bd28f5b5a233169975f6e6ab. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCJPS2294176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e97d752f82d830734e1a9138bd15f6482e7818b9e359cf50c80aa7352e08e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPC2481924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35834497d0cc658995b1fd4d9b274bc2b331deaa3562b83fbd180e44761d8beb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCJPS2219077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b82e733c60e113fefd79d20591ce49c9f29759aee8369e126eb6c79fdbda6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPR2201394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963d80715fc0e810e3950ad9cc600b44770d20909c0d304a89f66f913c5333e5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPR2266792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa94afd99352e3510b650e5d8e76c7d83e70234faf1c5e1b6c14e8189f61a15. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCJPR2284732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e15ec7cd4b926e0aedfcfad62009daa7c3376b106fdc1cf92e1bf1fd956bc18. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPR2234474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b82e733c60e113fefd79d20591ce49c9f29759aee8369e126eb6c79fdbda6. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCJPR2201394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462359e55f21f15e4e40c65f488aac0e1271ede013d7fca2d8240ea974bc22ff. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCJPC2482016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0ada0ed0c2a89b9c27cad0020bc0ca63f277b34e6875a0dd5cef0b2a50b27c. 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/TCJPD2563294.