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 0x0bc5b68ecb8733bbe0b75c743d4466a2fc26c6875c8efc66663cbdf3913812f0. 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/99577283-c3db-4d1e-b34a-4135eeb80e2e.json and https://artists.proofprofile.net/proofs/artist/99577283-c3db-4d1e-b34a-4135eeb80e2e.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 0x0f7ad91e3830b7ca4ff25ca0caf2471c41ceb9931143c2e6e5c4f4750e7d35c1. 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/GBSMU5612490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cccaa541081d5debe4ab0b3f5eecc59175a4828d897c7bba2e54299110fe63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU5612494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d2cf708fda500845e1079a4e0c74497909556e502acfcc42cc35e3292d6bea. 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/GBSMU5612495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf778a77146b8f1947f1a923ae5757afb2b4b7db7f0c560a4d803570e6fcbab04. 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/GBSMU5612496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0801129ea4f31f434a5167c0c8c06cf6efa8e5b216aed1e4451c4c371bdbbe26. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBSMU5612489.
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 0x9cdfb50e5a2e48e944d6151aa4f344c6d73b66435bbdc704a32536bdd22e6be6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBSMU5612491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc73a32ba7820c076a396783bb0385a5d3a20b40b766f3535f3d031c5a5508b. 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/GBSMU5612492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd5578f10903b2f74abd00754bdad2a2e71ccb71ed9586191899ae04ae3b819. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBSMU5612493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843c7c7694c622481d732b98dbba4923c6910ed4aa3cc101203d9a6a199c37f6. 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/GBSMU5609351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ffc73cf11633465381f1e6298f083d9afe981ada22f489e5548bc21ddc1cce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU5609353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5301f7e22c6aeda2650cb01b77eebfc23bf6eb7ff5ea577327d2688ac31b3967. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU5609354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b758705e5e9247dccf40dd431ed873b995c3abc64a03eaa69790c3aa1f88e. 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/GBSMU5609357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28ec71a975b4624ebdc655957554cc22723ae3e26cdd7e8d400e0c02c19386d. 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/GBSMU5609360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b46868f25099c4bc979a38cebf78d1780c2b65ee3559d0447189f1edd85e0d9. 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/GBSMU5609390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1238e0b23d9a33f320e70c771ae22a3d505c858d39c24f90097d8897c70c79. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU5609362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43579fc7214db07ee4bf3f1219fc3113c64f836d2fa9448efe3cdc3240470e69. 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/GBSMU5609363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fdb9bcac3a292de3bb8079df8b71d567747b34d6a926bb0cf73d743074acb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU5609365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a01f91bb50bf638a603d52544d11f55b9fb05a74879247c19de036a0b8bf6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBSMU5609352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6b1ed73696a89d8d2924c5ea708b76c53c5cf796ba668349fb455ec7cb3a9f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU5609355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92965e6e907c458a8ee7da2da04a1ec1145d35f3afd2f84694b15e66a6163781. 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/GBSMU5609356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aadac93c14dc7be97e8e9eed4cbe1b8a3bac5c749b28da730919cb2ca8b433b. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBSMU5609389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e62533af58277be9ca6f16216c7edc02c36880b16db86c4c4820fac636c59. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBSMU5609359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa2c575f1934484f9c15b794e660f3d9ea6ac8dc868467cf3c3fd1efb727e90. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBSMU5609364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e192c003e6a9f4d909d17492082a8860928b9976a78905bb704c973fa3cb4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU5615358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d2d2e46ecdda8366014747538b35a8e453473bb4932b1e1dfba08928364ec2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU5615359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94449d66580b28f1e0993032aa6047e493a051e8af2f64b479bb05cb950e9230. 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/GBSMU5612300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4018ae74d52c34adcf31213783bb3f47a4c5076e7afda669992db6a8e6030b80. 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/GBSMU4718248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05e71673adf0e79c8a0fc6c97a43c362807e8dec1469c66dce889000f7da6b9. 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/GBSMU4718250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99994d46b2726409935532685008a230bce87c06f6e3b419c1f115354534ecd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU4718251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f86fd2fbd45c9e0cf9c3e84bb8d738d6236175eda386168586eebbf18bbde. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBSMU4718249.