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 0x035340290903d15198dc8f878252e74a3869c26f46da03eb8b3fb78a582b141b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d94a0f2-8cca-4e2b-8988-6739a3495a29.json and https://artists.proofprofile.net/proofs/artist/7d94a0f2-8cca-4e2b-8988-6739a3495a29.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 0x00fd4e04fa6e1191f2e980593f95d16fd312dfba0fd270186b6ba57bdd05e990. 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/QZNWU2539084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb9a1c7725178ca2bb155b7d08c594a383530135d8bc9280ea0b95aec287257. 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/QZNWU2537338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da7d2081f7236156dd76d5051f5920b505013f28a8cef6e518d89bd0ffffc9b. 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/QZNWU2539090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f771dfa1b4a9b42a52b429929b1886541618c3392d4bad68e8dbad0609f11. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:37Z), 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/QZNWU2539127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3502d6e182ba059176de3033030c5425f76ff2b7d7edcf1e68b356df046949e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:07:00Z), 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/QZNWU2539086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1172d9a2ccaa27cd416f5822da93cff2c8ee4e2420ef61eab9de415981a1cd0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:47Z), 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/QZNWU2539129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc583fc0ffebe0f7c68d7cacfccdfb368645bfd081fa28378e38b6672bd0f0b40. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWU2539128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1646a24e5c8429e094d531977d9e1d7dd101f3afce2a430da41d1480cb2fd953. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:06:50Z), 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/QZNWU2539130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc1cb09380fdd39e518caf8eb59b766a29142204595f2a0ccad5e776ae8f1c7. 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/QZNWU2539132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1a969010283da238478dcb77d82139a5b681ef0af03551927b1966896547cf. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZNWU2539091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b64ffdcb3b9938324a153e475f5b3375952290fa040ffe1587c2ed137fe9e4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWU2541068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc54ab951d2b616ab5d49ca7da0bfc32fa6f44f27eabd529e221915d58bdb027. 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/QZNWU2543564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a3e82506092d86e40ec862d04941f23165eaab2e28cf7eab565495c6f6c64a. 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/QZNWU2539133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf11783b9e8c65aa84d5545892e0ce46a154dea24a7ced60706fee3ec1b7dbd4. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZNWU2541066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66bc533629dc2c48c5449995c834e1caa3800cb9023548ed3dba46aa60b1fbb. 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/QZNWU2539147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d23da0f37b4fad3958fc1108c90d3238b6edd3242874dc844a0880288a91d03. 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/QZNWU2539146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516e8d36ea5ac944f3218680494b0926323a866f06bd93f48b94bc2f0a7558c5. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZNWU2539134.