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 0x09bd76417b420263b39c9cff837a69cf1a9f3750937d15725f2c77d441778c60. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/575743db-f6d3-4914-8410-6ea2f8dfb5f0.json and https://artists.proofprofile.net/proofs/artist/575743db-f6d3-4914-8410-6ea2f8dfb5f0.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 0x6f955f5aa3c352860d56edaf14901c37e76f21d00cdd2d33cf0611dc52ed20ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2561065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48ff83413e8b103e8d3acd38b54dee4e99ebed6423cb703eb86085bc95c981e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZVEM2561067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3204b2b66ddbad199d88e3b6b7d920bab009aa1e1dda8732d5b310d8be868e1c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZVEM2561068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79ff3a9956ee5952cf494f4aa0d38450babf5d83791dd8d7a0c3e7dc8abd5fe. 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/QZVEM2561069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab7a07dce3aaaa4b96422e9c2f55c609299c8949171d77a02419e19a2b2191. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZVEM2561070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777b773752d0e8d9022df0fbbe88fb1807a3cb6c59dce8b2a62cfdd391ab4804. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZVEM2561071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6585fc0ca67f672503e8bcbefdbf9eeb904d856d99511493a2b9b5eeb4dbc6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZVEM2561072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9ad31b12b2ef9746580e0e78910b7d80a88000f587a905cd915a96785fb9ee. 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/QZVEM2561073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d33d0e40a107f974a8be83851163509d42dccfd25602743a6ba1eb3fcb98e1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZVEM2561074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d58a6c6fab01bf2527f70fbadfa9c34b4b32e060357b28c57a8b018e8a4326. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZVEM2561075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11bac59eb4b431d391f28c03a532ca3384c3b9eb40bb7c6a593eaf9f4d4bd62. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZVEM2561076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a47a013d948e1b0bb34b2b28fa4dc1bbdb5f263ec12d2390cfca072513bc288. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZVEM2561077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf31aa84323ba30e40e5680b5f13704980fceeca57a145eab75081cf3a19d00c. 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/QZVEM2561078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c67e2b23b3556c9f5830986989a3c87105becce897ed927309c461d22273d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2561079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd859100db6df4849e085afd008a7202acec9526f221f15d7ffa9caf2a9dfcfe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2561080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca39238950947fbfbf4e73fe493fac1e9bcfe160cb6df63f4f8581530d44b86. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/ES75E2507012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9861e7638865f74a4328665993d5b0aa2ae185de38404ea67565f523c39c535d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ES75E2507013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80f995c9644270c29126cdcd6e7d12f0388c77d39cf0b4e07b4433a98357585. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/ES75E2507014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f7709c463b71a81a72e20568859dba07c419247724e5bb1c9f32d6a59e0bc6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/ES75E2507015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145d7dfc10a4f856545e4493cd57ffb77082627a99a7a551a3aed7cb50b40ea5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ES75E2507016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5926f9d5cadb0985d4aaf8dffdbdde726be81615867a2b242f99cc3a15a032e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ES75E2507017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765db9ac96cc8e5b7f44251cb2775a276537992750f32d0067172dc457fe9ca5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ES75E2507018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915ff185e4035975ef09fff90ac73e0c5ecda83d152caeeeaed8949c62349ba8. 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/ES75E2507019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb94598adc5f08ce33c3d93e3845e93788baf2bf257dbcdc9641370c0f61510. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES75E2507020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6afd99981debdce38fb20b97e6ca5fc0241bb1a8852dfd7ff334ac04d876c46. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ES75E2507021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50383e3b672f643551d1cec1a6052b9196fce8dafad7d5b6bf908e2eb691e8d. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ES75E2507022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa94acf0505dfacc042797dca9daf8984ce854935625d4fedd21d46a918e0aad. 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/ES75E2507023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa246e59fadcbcb249eb4bd0f84172b90f0ab82a2dbd82d0b1aa3c6962c0799a3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES75E2507024.