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 0xe967b5dcdcd4f7730a82acde0e849e5356c5da3b0d2fa05b59a70d4e3eaf9c7b. 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/5f838fe2-aaf1-4b48-a03f-8864f5806a24.json and https://artists.proofprofile.net/proofs/artist/5f838fe2-aaf1-4b48-a03f-8864f5806a24.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 0x33a51b24fb09c9160b1574724a0cfc94b83c19264abbb767efe386b240b6490d. 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/JPU902003527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffef0fc49013b01f3c8a0db668c54b26dd71c52c5b4ce862e3b1f76670ef69c. 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/JPU901701212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f904445238389536842c6624fa23053c0a3f4c3b7de44f05f20de2e220021e1. 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/JPU901702471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06599b51ba45106de567bd7b0bb263a9919ba6a835ad34196bf627a886dfc09f. 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/JPU901701213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495b63577f01ee13b0aca96880cbf85d6919da529ee8b74dafb07418885b420d. 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/JPU901702475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a5dfe95d85d1542a59599046356d6dbfabd0c8a550cdf9c19244d17c07f051. 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/JPU901502262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85626ca25bff7402123861343faf714e10e3ce7dc436b496a329c2cb77954a9. 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/JPU901501058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec951dd658eedf3896c89d649f3b746110f6de062f9f46d05aa33048a4e623. 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/JPU901502265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd7ed2deea1ca0065b402d1fccef3db12650239534949140a6d66a3594f2d7. 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/JPU902001087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7545384f0c9239983d02422d6b3af6d971edb4974a51af09a4afef617f055ce4. 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/JPU901902042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c1869609f2ce21d399c4699d2a5938f299b8cf4e626a4947b5dc3f2280a097. 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/JPU901800583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffef0fc49013b01f3c8a0db668c54b26dd71c52c5b4ce862e3b1f76670ef69c. 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/JPU901701212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06599b51ba45106de567bd7b0bb263a9919ba6a835ad34196bf627a886dfc09f. 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/JPU901701213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c982c97e777ed8ffa9e1bb658ee47857226d9d91555e5dc42a7ebd5a77e5a44. 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/JPU901701037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85626ca25bff7402123861343faf714e10e3ce7dc436b496a329c2cb77954a9. 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/JPU901501058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4138a78b0654e8d23a4b8bb80b4f652af425f68b0c972c7408da24d5472592c. 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/JPU901501061.