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 0xfe5e0808f98fce5dc82e9bff762d296309f3d352afce2fbb51cd6a369c391500. 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/a0442220-102b-442a-a296-fed0c4171122.json and https://artists.proofprofile.net/proofs/artist/a0442220-102b-442a-a296-fed0c4171122.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 0x0e4013249f6edce7d656805616eb4344f342b3fc5e719ed036fb5da24351b606. 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/UST8K1522680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf05bcee8e678987113feab3d577a1b57e3af66992b7a425f84222de79c01b07. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/UST8K1522681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b052dff7334badd4535911b29c237cda42e24e14eb82e1123f82da263e3942. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/UST8K1522682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56dd335301df1142a9cc7d80cb12a65c0cd5f7e9f93393e1d65d40dbbb15b6b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/UST8K1522683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e209e61f41cde5e89bce7b6c3d91d1ab1d19842b636d2c8cb0ee4c71166a2f. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/UST8K1522685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8b25361d1f0ff49eff20b552fb0a0156e76c25e423bf4bad67981f48248aca. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UST8K1522686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98408859e9385a19339271171640e5a2a69c8daa02590f178e9afde11e30e8d3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:59Z), 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/UST8K1522687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f42c9c57630967aa2bed4bf6a1e1777706267cf140338c9388db12a86bcc2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/UST8K1522688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ac6ef2ee9a35638b11b0dd44a95fefeeb54e7393a62dd2e76b132a15c8a01. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/UST8K1522689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff7a6c45ea1c0279e3d084eb216341e234836a3a91a137785c05a10ada1de8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/UST8K1522690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50567a6a43bbcfd4b8c4b67b221eca81db1cee7c327785dcd22bbcf3bc2b003a. 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/UST8K1522691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ae854174da997e1f55ae6af8a347816efd146d96e74e17a80e269487c110d7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:14Z), 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/UST8K1522693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf0a4d1e2ce5d337361ed76aed5211476541b92c774df67d7eb88c36f5880d5. 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/UST8K1522694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815a32e7724546de7908bd1d236884e5f6caf2ee509317d996282991b58556f9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:43Z), 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/UST8K1523681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3a0565a375acaa0102d9fac7005cb770ed56558f8d3f37f35a04daf152a2b6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:02Z), 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/UST8K1523683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1ebd0d13970bf66a0569f48822325d7506c575c0fc3af649117404bf087b7c. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/UST8K1523684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9c243d6a4e10decabc03ee53432a14510108abdd98db1f9443737df0b7ada1. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM2PV1671824.
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