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 0x82673c82af10aff2636dad91daa067bf5a7006f019e8012d2f874e48a3f1a3f9. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/568b672b-2d77-40ef-8628-a3cac9405e20.json and https://artists.proofprofile.net/proofs/artist/568b672b-2d77-40ef-8628-a3cac9405e20.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 0xdf7353916d0d188c4086d7d257ca1f51319d1cf44c21cd13d7bc7ed0abf40fa8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEYX82180450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec3dafd3732a7e2eda5ca68604ca64d67d94f3e7040e01369afaebc87d4e1b4. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/DEYX82181864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc1ad8dabdb2ffc7083988dd7427bdd520b3dc441364ca1f7c9bb36bc9f0f77. 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/DEYX82181268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8227cd590ea25ac3b7ffe9d0f5622f3aa8783d00326e20636f1c1b3c606eeec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX202100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d372bcaaecf8379d53fc370bb9c456ab13843b03512625d79ba92a387fbd94. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX202100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919aeb88a6fa72f312370af499580ebfaa7b02e978c38d5c90511c616c205e5c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR96X2125235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa481b3545fd82662fecb322b5d37471f60375ef271451427e52d1215c80b36ca. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX202100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ef07b776c97d9b9ba8022a4cd97335c34e598a468cc1c21160d48fe218e0f2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX202100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873bcad9e292c3ba9e929fbcccf32d4edde112acdb0da05ca892a86603cf800. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX202100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f90feab7c86fcff8f01607ace13bd7205b5d6604a42f43a5140061d1291546. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEYX82169935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adfc45f1c025c525ab4907d358b6740a53932bc48a00732cbf125bb19d16a29. 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/DEQ022260456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29069a1ef5631669a5280aed8fc04f2742051e4272f382bcd808815b46ebc62. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022260447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70ab2765ebeece016212ec9ce423316cdb74018379fa012496a05152586a40. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEQ022260448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c802f0fde53f6ea419fb40c947a1607894ccd64732ce110c4fe6228807dcf0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ022260449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b568c89931d433f285c57f42795047db8a4d9e8623ffef27326db112c8c400. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEQ022260450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf852f100833527d86c5248396d50db44b27a9638e1d807d632129c91b7ab5a67. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ022260451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1273f30b02230fcc3a0f027401a0713d9796d7b65d00dbf3264e74b993aac75c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEQ022260452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a857719762301915b8afd5613c58380a1687f4fcaf1eb217bbd0982253dadf9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEQ022260453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebf14c07be021d5321f687c647d79a4e346f02d8a3777822825582c1905bdc8. 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/DEQ022260455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adfc45f1c025c525ab4907d358b6740a53932bc48a00732cbf125bb19d16a29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ022260456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c9b56731795af395cc6255c1def2e13fbbd93aad23df1f3b9a9d632b74b2c1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEQ022260457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edd0ce479b285f96c210752d59dd9c537af9f13cf38c8f6dd53b2bad08b44c7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEQ022260458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ab460c7269135ead8bcd458923b61338fd97c0f638bd6f09a297106f566a27. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEQ121752996.