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 0x353947bfde03a13ec1ef38c5440293f3d40becb06c3195dd1ab7933271cc8bbf. 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/cf8c82c4-9e8d-44d8-b328-70df8ab7d986.json and https://artists.proofprofile.net/proofs/artist/cf8c82c4-9e8d-44d8-b328-70df8ab7d986.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 0x6fe990360f927d06a94f84680b6a7aa961b1283f292ea5360443efbf0c9200bb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLFP1204227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec27c70c6c651eec595ecc69a55cfe2eb9785417743cd7fa60464b9eb523ca37. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP1204229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde5880db8699e0937967e273c3b3b38e810282217dc0041def0ed6283b199d. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:25:37Z), 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/GBLFP1204231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f164ea274e98f3b09c18c3b3fbc9ad62e8bc70054b7184cb110f3d406d1759. 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/GBLFP1204232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e6c9476de4643b4412e39b3181e3fe4606b0a151da3e35cac6bfe6f9ad5e3f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBLFP1403836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e9732355d5f0917a47d3a9337a67c4d3d0a8ec7463f64aed2621bcc01b0e84. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NOUQO1605020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd16be3a0be0c7657d4c08ed4b4ce766cf2c1d21801f8e9f0521139981a8b23. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NOUQO1605060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf408edc1e0736b280fcb133821f454139e796f3235541288e5697bb9515062ab. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/NOUQO1605110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07edb97e98e1861c6e0e036da5e5139338039d9d95dc59ff4ef220f5ea018c71. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NOUQO1801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110f2fd3c293ed7ec4b7c140dc012fd5d2b68342bd73acc33ca01f09a1c9468a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:12Z), 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/NOUQO2201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5768b84292635d6fbf286a7dbf61238188be3ca283fab4e04ee8ee6dd3d413. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOUQO2201031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c11df374ae6411e5fcaf23c337c5158416a64260938c6803732174ee702b74. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOUQO2201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce6a0ec3a2e88bcebab063521daa44e67e44368945749989235df8661b344c8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:12Z), 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/NOUQO2201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eac8aa5ca4e8126414d79f38bac97b77230918307cc0119636393c714b56dc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBMA22360417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b5d503b65c07b9b0b69c7c1ae68d20ff314220715038863834420d6f46b3cf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX53U2313991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18b0e2ae65a2ed96317e1b54c266f5372a07fe2df7a75aec5bceb35a92490e2. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GX53U2371078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff75ac41520ef8918ae8c63964dd272b3cb2dc25afaeeba7b9c18c90b633c9fd. 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/GX53U2371079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc249a6966eab55b2505f90bc78334ea0bf3387ac7a85de3dcdeaae1e2d2342. 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/NOUQO1808010.