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 0xf535c4a38aec4392b7606da9c37ccfe010933a107bf50247e61bb379241bc339. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc96b8c2-a045-46c1-8758-7cb1347b1c2e.json and https://artists.proofprofile.net/proofs/artist/dc96b8c2-a045-46c1-8758-7cb1347b1c2e.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 0x801c0dace1634fa613e75f0b8f1bfdc629942a2cc87e0190cc5d4b62ef45046f. 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/QZZ7Q2565992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f144a72694d8f6673e4662150c426634fbe3ec959dbfa7f76b857aba569b5c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:48:49Z), 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/QZZ7T2520605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1450a7b9431c27ecd732c82c8c94d888d15ac4f078424eebea95766d5efbb7f4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3EX2535227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32fa52415e14e027b541f2c1e1a8e631c436b1c02a2057b4db9dfd1fd93118d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:19Z), 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/QT3F72567330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feceb953dfb65d6fe5b0f0e2f4a074378b987143780e02d5861fc3ef24880eb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F72567327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8381dbb7f7477f089da710a7ad471a14bc00760fd6d963d2c2a53cc32771a7f7. 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/QT3F72582688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7680b214707948a843771e7834242d32daef25111237f18b8674dfef6afa90. 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/QT3F72591227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7836afbbf9c25667718ca19b5f0fc715f8b02db84dc69bdc1ad4aed9b1d802d2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3F72582702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235e249358c8790ec16d6e2d04108466b2839be418e9407e1f0829721d3974a1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:43:04Z), 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/QT3F72582689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5048ef65ac16b5bdbebce7f95dbf35aa601fb4ae3108bcc7a517ee04a6f7dd1. 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/QT3F72565199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce74c345239ca600771bdac0d513cc0f1003d3dbcf2f772df61f6fe308f70ce. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:37:52Z), 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/QT3F82557674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54704341c5b93912b392091173224fa0d5c17192571431a21478ca74c9c0f312. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3F82537417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6cc87221030fa82c373f8bd966d4b3fe7a26b068dc7ffec66c6e632d58613e. 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/QT3F82532775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3a0f794aad23d314516a7ea0bf87e89ff8f9ed7da53a5d601cade9ed5ef509. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT3F82537297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deca6569654c6e9e27896b14d616178d8ca33dab7055f132dc510add0f2045b. 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/QT3F92521238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355b084a3b75e0e88c93ee1e8b5dfef6a7eda1f7f22240d45b61bd1e46e1d0ea. 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/QT3F92503766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8559a2ba05a3e71c670a9831cefce1480eee702559790307e53cacd71577f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:50Z), 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/QT3F92500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f60018118503c41bb9180b05c48c7fa494a9b7468c6a3de1c8f61978090c41. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FA2551403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a76e16a34bb8817254a75ef35adfaf5735b3bf4d39300746756eb24febfdf50. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:09Z), 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/QT3FA2553607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069b4bb00c27228f46eec0dfc4af55714350ba0bb82651fdde75476c932105d. 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/QT3FE2531231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855bd4701aabdd2d996c81c6cba8c2b5c979a7bd8087ac1b3af18e9fd78e8ced. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3FE2528441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30337ba07784f4d4f3025bef7fc4f8c1e87e05ac4318d7e21b275abbed6e6519. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT3FH2574660.