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 0x42970ef501c50b91bc141c957463a1b6cce85eb674e4e579bd2e96f3e80ce5c2. 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/bb34341c-357f-41a3-83ca-5d9b966f0678.json and https://artists.proofprofile.net/proofs/artist/bb34341c-357f-41a3-83ca-5d9b966f0678.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 0xf35cd9729e8a3fec0a45496cb88cd190ac7ba5230f02d50c3e07c946469d87cd. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEQ022280379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9653491f5ff0403b4879c9b8bcee0fab74b847a7a7029368d4842f3c231dea. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:17Z), 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/DEQ022281465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498d1dd7b2a34d800a9e2a051b711101abc7eef412a409fd40f487ddfe47cd6a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEQ022291062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea852b06319554cf9fe7c821703e2bbe03960380799763101a54fc0380f885b. 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/DEQ022284324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556e8221c0ad604b5158234c826fd49482c2f5b546c1548f495de231393140a7. 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/DEQ022285097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952675da0886c14a8f5671f743701526d40b62c8405eacabfb720ae8a147ea39. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:50:29Z), 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/QM3DF2202964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb765fc288910a53528e04d683616b4b7830fe987b87182d6ac2ebd44c3580c. 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/DGA0Q2324045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97b1ff40c8ed0cfb59f2ab4d88bc728a55da1dce839ebd9b90780d6078223af. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:05Z), 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/DEZC62453880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f629b89c827c38915d2bb81e06b1d90afa42fdfe74ef2c991bea01adf3c86d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:50:34Z), 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/DEZC62580503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5510fa6745f8ad669607704017f19ffc6730f4d360a38f554b12b0a23a105bb. 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/DEZC62587333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1e37ec93d5ae429cb21f64c3fa9f325a4d38d94bbd579a627347595192bc7d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL1LE2302959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19b812235b5b4f3dfe34697d1c190fe742b278b1a7a0e44071041ec85245fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022281828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501a244e930bebba09e8e11514cadbf37d598a1f0d3cc5fd856940fb1abb1aae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022281829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac43b9bda88065fbeee441f7b2264a7493f62023cc8abec485262c8a494ebef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022281830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1f47953e42f6d4ed50089ebbe8b6d03ee24cdd48af516fbd78bd2e29c0f17b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022281452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee2ec8e8adb8f25a08870e911749c2007a650eb4852d6882e8a823507ca18b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022290578.