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 0xa2ae9d80e2a931b54fc1ab6c295b43a129925016367a0b7b0c8e1d0263867082. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/735d5655-19a9-431c-bcc4-ab6aaaaf0a0f.json and https://artists.proofprofile.net/proofs/artist/735d5655-19a9-431c-bcc4-ab6aaaaf0a0f.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 0x767d4a01380c146b06bf0c532eb802d1edb308527f70415269706a29d6262ce3. 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/SEYOK1525460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda9dbbaad21cc9607c96780388518aa622908cca28acbd68dc60f2d03d60d2f. 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/SEYOK1525461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc602a3894f13be4a0a10cd78bf01823de8654fc945a52efcc3cb4a3b1a1e83ab. 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/SEYOK1525464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecca52056aa7daf4f3505d4e744fbf3079f8974beb124d78a6f3e23acc426df1. 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/SEYOK1525467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256adb40704d8eb7e9ce5255617602ccf6447ea7799d966b45c3e02854bcd706. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SEYOK1525468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eabf726cf570b70efe6c2cbd824c28b47eab2865b0827cdeeea3a06a7804917. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SEYOK1525469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2530ca9a989bd2d86139b617df4deb22b7f3b5631675e98c20b0cf2f5237339. 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/ARC290600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac7be07cd9a4c41ac0f3d1ca42f0202ab48fbd798f3ab8cf9d2adab94c8d22. 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/ARC290600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2bbb0e79ffd5b9dd8ca04dae7a147b9c5e7bce830be9337c41b00868e3878c. 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/ARC290600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fe8c2412de92c06e544fd566a2ed87f8bead12e65718fc7155ebaf773d06be. 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/ARC290600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97b581d062b48d8c577d2dc6ce3a1ba55c9dd3cc860722e522a606d4deb48fa. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/CLLL21300192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20877d28df139c6bf43cd54ec0e45eab7edc03e7fdbde2d18b04a64416f5938e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CLLL21300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea6016ba772215fbde5a496c0a20986ed11a52b02d214bc47eb0b32a2b51365. 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/CLLL21700480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3f041b56bc8ae441e287d6185b35253513fa6230536d6e1095626a0b4573b0. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/UKXN22388332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff56313d24f6743887ad9aebdf14a28b9a5bd2727272c609218905d87e780a1f. 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/QZZ8B2425836.