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 0x20559e6d57ac6625945e99e9cc6f4d5873b2e71b630146cf815f24916c686f53. 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/1f2d3efd-c651-41bb-b2cc-33e3c21d7543.json and https://artists.proofprofile.net/proofs/artist/1f2d3efd-c651-41bb-b2cc-33e3c21d7543.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 0x07426a521a72ede7348742031e0ab5323f8accfde5e65a964cb2bb727f0a2495. 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/QZB4J1823729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e7b32b96d0d80803f5c3ebeb85ad4502f462fcdfa9419510ed7fab1249814. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZDA41836718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9574a677c3711c9610655d6992726d8d3c95c9ccd1585a843c357c625288393. 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/QZ4JJ1933896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a27cb181add0033f79dfb7114fa85e9bd55337b02f5e6504ae5571831b99d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:11:35Z), 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/QZFZ72083592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab04f70eb81ee18cb890706bf75f56ba15dbfc52ac1d61de6f1720941ff1e070. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYX2452811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa74ff05bf49f416c9c396c28b5b74f69a8fa275595936655cf558f95f75f36. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIG2439797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292021b3178a540494e0740f60b2cf0948ce711c57a12381dfc2d22692a63ca9. 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/QZZ762455063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5013cda1b427cf64f19700617165d7eae440f13c50b14626315ec87846ab985f. 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/QZZ7L2432615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf505aef299de6958ce6f418c5740cea1e1364c8ed306bf42899dc2a8ebc92. 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/QZZ7R2455578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ec08477ceb7043f8cde3603a4bee9d6e2e9078bbb413266982cb44831c2ac. 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/QZZ7X2419008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55cf0d8a6eb3ca608c7b40e5da8471da9eb2d9e44199306850e480133b54b33. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA42553679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a9b855dc0aae70554dad5018205f25bfccd8b84dc0fc4e775c3a35b9bc851. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN62540221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6549a5a2cd6d07dcaf9c895d050dd156b7a4ee5672eb854f8b1e2238dfa89458. 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/QZHNB2525105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1392680d9d1a353190f4de75ba8a749bab51b85dc706910dc13aaf4e81a69d57. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZK6H2536978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d1fd00b25f071ff6f851ecaa1cf74f81ce29ebc00052325266ef85b5168e37. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWS2585884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9976af316142bffa26e34c0c142439f122b8f1d6eb4701ff676c8f5419657791. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB32516289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ef90e90db9edc7b6321048c4a18271d99b1c42564eab3da6352831100af178. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:25Z), 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/QZTB82580810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e93d0dda173a6e20150c15e2738b02b30fc9c77b793e954dae85fcbecc7ca8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:04:13Z), 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/QZTBA2525015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9f517eb5d07fba2426a1d7f4b6763c6b0497f0bb96e46b3ee4f1787db19d8f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:53:22Z), 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/QZWFL2580428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10da84c7c9ff31c998ad011a1f8e349d6d8faaaedc4e38398d73f9ce0e3fb323. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F92597570.