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 0x34587580785a0b7a7e623cac4af0444489e38ad48c194d256cdb1f3c2fff3821. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f1f77e8-a62f-40aa-aa02-ce78ffe9d12b.json and https://artists.proofprofile.net/proofs/artist/1f1f77e8-a62f-40aa-aa02-ce78ffe9d12b.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 0x6194e71275ee0879b226d77a4a36af46e3730f271797896a60aa8fffc7265621. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCJPX2394427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffc504acaf67cdd2d5425dfda49d39dadc89b7556853fc76e64db7f931b769f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:59Z), 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/TCJPY2305272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aba22b9ad2d899944ab11519c293a99a4b2f33fa349dfbea6844895ee6eb9e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPY2361021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74bdbe57f8746b2668e9c44a2f8f091da5039d7c571e7ce5a0d3f7cfe5d5c87. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPZ2486362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cca90bcbfa1e3309bb40fed5eaaaebb77fc2de8f858e26dc0728699779f8c4. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:00Z), 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/TCJPA2481055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18e53976bd1e583220e5d134d28f817fb650a9f22201a093baf23ccb0b87fea. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPB2425080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3c2ad4805e2c9b9e2600281b133d030892318907664d8d2cef5f1eec8e7c7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPC2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392245a44a65df7cf8d6f0efc559ac9eee324fa63f471e8b688c6036f71cc724. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:30:26Z), 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/TCJPC2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5933c02171a9265858af38d848e9ed72ad48dde6fc8ea3f99cd410af9a1a1ac. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:13Z), 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/TCJPC2454095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e1cb6b9d96dc8c964c4f0e44d841422d705fd79afb8b6035e1a939db4c28f9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPC2461953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3670e3a68a63485b739c18c0f320c358fce066d1a88cd3b6133215e904a55c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:51Z), 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/TCJPF2555600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9895f434351e22807833a6682a5c69635d02d2cdc8090d9b78cfdf74a0ffbf59. 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/TCJPF2586270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edf3776a4ab67eb7c5b00525b905ebf6454075ad9933a6116962b6962c59122. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPF2555647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa881058b89b8b9efed23e37cd7b070b000234323123d40ed052bf6328bd0c67. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPI2551703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe076307b4f6a9904c83d81c6c7c73e2987632cd6f39f860f25052ce4ad54415e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPJ2567700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d941b5d2dd890fe64ca9deccc108349eee3545d0d411bb647f8c5bf7722894a. 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/QT66J2519297.