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 0x8e3bb39758897e574efd8b4f7c7730dcd0d1c1e85c55a7e794c6cd1d0360fa10. 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/f25a0a8b-b03a-4bcf-9ce9-bc3a3668a992.json and https://artists.proofprofile.net/proofs/artist/f25a0a8b-b03a-4bcf-9ce9-bc3a3668a992.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 0xbe27eb7e3a6c08ead76bb461e6571898a49fc25ed6f148d92341a26023ec8d03. 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/DEH741212002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acc9c0b90219feb05afc56360a94e90ab5e006b9e1d7dda53a30b85ae8d166d. 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/DEH741308945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40bd59ae9041c6326c489367f65ef011729960a41de4d796c87234b5a39f98d. 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/DEH741403723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91d77ce480ae13ea899e35cbf4be8c569fc504ca5b47117191d03bb76844208. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEH741716721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5959df4d723da65c9f9f1d88083ab94d52ee859ecc79f2677a1312f0bc2733. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GBJAJ1800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591da2994141410b0935c58074ad828aa1eac0777d826c66fc6df108d979f1ab. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DEH741801993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e00a2dc7480fbbfc5f477e09cd59be850a1fe45717d8f0d85dfc2891cb464b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEH741813048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2381853e352f7d8ec24e392bc43a0a86cbbc7c4c2d9affc5c12a72954b20ad. 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/ES94G1916404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eaa506b189426ac94c86780dac02ea651146a02f40be03db77b3e24f135472. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/GBJAJ2100998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf903c4bfc386bbad94b68c12d1068c2f5cdbe87d93172072378e93a20785a746. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:56:50Z), 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/TCAFY2162478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc6c0a06138689b4a7d08e0061aa99e5e9d6f60dd7d222086dfb1ca7203dd1e. 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/DEH742214704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6b7694917e46b322e77cf899c11852cb034d5afc4f6158d33454b21fe1c0e5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEH742214705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600843341812b2e74390ccd29830a068ec7b86fa0de35e2f74e3dcdeaefc816c. 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/DEH742407318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639557c0125d2bcf29eba294c78e46eb008894dc3f8b5e0a714e2d6acd08b8ae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:16:31Z), 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/DEH742433700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc215112bd11e4ed00b2cbd5f1acd995407ae526c42d50dc6d8c6d707060daad2. 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/DEH742502500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5404517ada5c8ead54229b82ed635cd1045ebc1fa55b679fdfac70055e68922b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2540916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b322f59dc353917edca21f234a33871d5a5be97da7a70e364c334e2d2ad66a4. 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/CA5KR2540917.