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 0x514b8ee472df9de55f997c4ea5d1a93e8bd3940fc2637691571caf57372b4589. 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/20729178-da49-4497-9165-4144bd2a0995.json and https://artists.proofprofile.net/proofs/artist/20729178-da49-4497-9165-4144bd2a0995.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 0x908df40602ca33462cfd35ebe8c6069fb5f830838b9d2b21d08c429ec63fd5b1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZXLZ2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0f39fd94865dbf96ce53cb097518b51b4a19383d3d17c95a21b9470d1625de. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:57Z), 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/QZXLZ2400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b519adc05219371719420144f89033ecfb6b9480813f97bf8e2bcc154231b6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:06:20Z), 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/QZXLZ2400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aec50f64e5576c9088b96430160ce778266b16a23854c488d82cc4e3b02c082. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZXLZ2400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68c3dab9e7b450bcde74dce20c4c8b110884a2f0f6b0279f6ccc62318008fdc. 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/QZXLZ2400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947a1ee412d7e081c469fcb0336ee07b66f41002491f4f7e341a3fa7f4134a0c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZXLZ2400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a902fe25a15f6c195e7cf8e60172569e03113eb58210667ae1a21169d7f746d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/UKXN22555544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ffc2edf9668d92649702e5559502e620d05295b0766ed00bc6eaf21e9b1237. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92519148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00092c7ee5c693170e60be9865d8a4ecf56196f47786e622f94c7bee3416fb8f. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX3Q92521441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88741fc24249d3a1b7d6d5a119867d1d1eef3bfd5215f660b773ca0384a337d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX3Q92521433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c7fa42bfd21ed6ef3d57d2de423b83019897fa018795a97cc79e6495bdd95. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX3Q92529977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3f6d44228c552ce320e4093a45ddedf0bc8581df0941e27286dacdddb73e10. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX3Q92536133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14019355bb9bbc05297b15469421946687b467c067b1f39183121db434eff4d4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX3Q92536093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408d3a526147e0e436d40c66edee2e9f615192d593b23520e24f97c7c03db81. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX3Q92538830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aff3e05660904d03f753e05ad0dd9019eee77bed5b49b29b6bc2e11f58e6cc. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GX3Q92569251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cd3fe9c3b94ad5d52ab81cbe2cfea62f0053ef73f6ea3e7f12673be0bdf479. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:06:13Z), 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/GX3Q92570901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf2e3f41466684ce8306af4dd7bba0ee4e13c654b61546167385b69c37eee05. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92575844.