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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5ad538c453a4e35e95efa1836b5f3080f048c360e44e0271cc41ac066dfba. 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/b372d7f4-42ad-4055-9222-4323f58765cd.json and https://artists.proofprofile.net/proofs/artist/b372d7f4-42ad-4055-9222-4323f58765cd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbf5b3347ee9b666746109ff68f72f5584618d884be25a3fa8d5a2a60413a55. 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/TCACY1786631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4f24248ed2822b57ff6b4c8cd4beb5ae2c4af0d47419b91c245edb4e3cb8fa. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR10S1837313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832b9502372377bea5c769f07e3ae1253598238f140dfd57a946ee63e38832a4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR10S1837315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdd4cdbdd08a3c903b23bc1cba0b6823645cdff7993602d9421b722417fe2c1. 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/FR10S1837317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb165123f9e98aa6648a772ff358ae92b5b358ac87151ce167b03dff0de742a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USLD91719041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881ea15664308fa29a06429d8296fe4fc812899b837e07af9c80050cec93e0c8. 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/USLD91728775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095cfd947df08b95b770d24ee1f4fd79e6068eb88a72486681227e773eaf7655. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USLD91719042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b20516435992e7254df413d633eaf677223def2d8c8dfbde04537820bb59461. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USLD91728776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf943721f248852cd9eaba9981216855e9a6501247f40520a9855df868ddc8ec1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USLD91728779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3d0330f85613fd08b9630efefe0e726319b4239db33add1e01e96e0e283491. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USLD91728780.
Winterfalls (Live from The Costume House)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccbbedfdc175b45b9f26899ca73cde18e2fabe206bf5f4421103c1d4aba257c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USLD91732107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c49a7b23c93ed2cf28738e836cfe2662ff181eb17a9b8314072425f028e886f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USLD91736853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72124e22e8f69c4fed9502a8c888c5042e4856fdc7144240db7e24d43ee3c92. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLD91746964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759869750dad454091b20e09fb3309486dc40360bf316242cc31139407c176de. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USLD91762394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d51a8aa96afc450b4ccfd598fc87d6ce5547cdf46750a1a6487f2cac0c0696e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAAA12169101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656eb5607f6b7acdab5d6b93ebb9e3d26ae30d252da7a2f41b01a7614efc9efc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CADE71600005.