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 0x93be145cf73521f00b0bcf89077e6f7ed966a703ba2c3290c30f0fe89dc444f5. 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/0053b82d-aa6e-4f0d-99d0-9418d14d63d2.json and https://artists.proofprofile.net/proofs/artist/0053b82d-aa6e-4f0d-99d0-9418d14d63d2.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 0xd167efe89b47f6aaaa52f32372d50f06ac0125d098af5e2151b71367bf579985. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAGG2235384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c77b4d1640253f45e7429649a8cb0caaf78c3606276980d892e075b6d6be2c6. 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/DGA0Q2374224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf618395baa4da810cc405d952d62e5d4085bc6be07102d9baa1ed188c7a36ef2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0M2476157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a301445c1f460046340867bedfc2a96c4ff8fa11c1ed907d82d25bf3ac421a. 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/DGA0H2433237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a579b37bff49be5cf3e742dd412e1fab1c56804b97d303eda01564736e513ae. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DGA0L2416259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868abf02f6617adbea530f8fc2872b665548a736558fbf0ed094e7a7a5a53ee4. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DGA0L2416258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a579b37bff49be5cf3e742dd412e1fab1c56804b97d303eda01564736e513ae. 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/DGA0L2416259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64dc0e5d853c4c8249b218729233251253cfb964d3f6c11eafcfe31f4f513f6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA0L2416260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd719ae35f27bdb0063661cd050ab6d8f61a67f76f32b02512d8c1f2f2e7a1439. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA0L2416261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c77b4d1640253f45e7429649a8cb0caaf78c3606276980d892e075b6d6be2c6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DGA0Q2374224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998a7c685c38a066b5e6429268894e99bbee8348c365be37bc78f3646503d03a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DGA0L2416262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88cd24bf9cac2d9408d280df14c00e277fc2acdd45a315b4ec5a4cd8c99c31e. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/DGA0L2416263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b307095e8dfcf7028901e3e5bc5f52410713ecac6a6bf37d1d195460f02561. 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/DGA0L2416264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb715f62be1cf2b0970ab6ff389c6839afca8401514e219cbe200587521f6716e. 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/DGA0L2416265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0019df4cc0ec27fb30c78b0e7b3253551a2dff8cc444fe481b2891791f8f12. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0L2416266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317aaf61757bbf1b4b99444120728845fc277514dc12ecf453b1b402ad3f3f31. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0L2416267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a301445c1f460046340867bedfc2a96c4ff8fa11c1ed907d82d25bf3ac421a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DGA0H2433237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a64f26bd8577fc0b64700ef62b2eb0be5a22791ca32168856acf154f5712e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DGA0L2416268.