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 0x04492975f91c624ef0e844a8f92fb5dd36fc983aaeafcf8db826ace7e9f967d2. 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/418597aa-c7d1-4154-bc38-2e4477425527.json and https://artists.proofprofile.net/proofs/artist/418597aa-c7d1-4154-bc38-2e4477425527.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 0x7bf0f93fefb9d641f19ab20a81aeaad8bcc7ec41c721b47bacdc02266991db3d. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZZ7U2408201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd22ded00c4c497cf5f78a9c2fca7b636482429faee05bd8797ea01a516cd50. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7U2408213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3833f5387cfb769c4451881e16fb393a75eef56402a4c5c955d0f8f4f68b0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7U2408216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c8acca7accbd2faf91aba677c9c0561afbc94cd297090d0022ae4a863b6f56. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:50Z), 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/US4N80700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c9a70001b149251e6fbafd09ed2af9d4c9f41c16aca5a97cba24853de61eff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US4N80700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ecd89b885a6c014240a05f0c066a317e7c70b3fcd89a37c3995406d6e8937. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:47:52Z), 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/US4N80700256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61239c38ea56232df9b2060bc385d79eab5efd11bb8bf9d908e2396e03ca6a0c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/US4N80500959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ab1883b239901cc5def672ffd2a0277f97ceaa1757cb4cbad38a73d1dbf023. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/US4N80500967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69938119b745b3661df601d47dc8c251bf15da65251920b78518b4b388fa97c4. 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/US4N80500968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbeb665ecbcad2d9f32dd5f9e75e2a01b9d7fd4698993aa504025e9b2bec3f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:07:58Z), 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/QZZ7U2460590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18edba9e1460157e815e4743d525cc092387f55dd6f63b9c7bb01586474bc702. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:57Z), 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/QZZ7U2460591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fb91cefb023115ac26c39313da893f0639ed5aefdf554a675b18cbc91efaa6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7U2460594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a039134336673ca2f4b176c49f404946202d393cc1e54049a193c3b9675091. 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/QZZ7U2460595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673e93b748a9c715c994e219f322f8e190ed9d9171362c1141b21c19e6f75f7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:24:41Z), 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/QZZ792485562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe970455dc84638506d1d18d7a37aa83b158722e7584c32b16a2f2dc7cfa66cb3. 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/TCACR1660510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d247616c27804c0ee96f838ea684afad47e53aeed30369eba935b7a1735a791. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:03:32Z), 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/QZPLS2255364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff21822c9798252114059678a358b63edc4cb4d5a562cf7f52e08a7ba730fb79. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPLS2255369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7bd09be0ddcf74281c2e4e21d8610b60120060b66249db7b721ec7a08a40b1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMTND1101139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3fac91ebdc8ddcd44ded272b1e634c9d604f9b2d91bad33502221eebfd1f6b. 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/QMW431150035.