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 0x071a82eb20a823b321ddbdcdf4b7437511cb5e667eb35b967c5ef0033acae084. 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/5512afdf-4d4c-4ca9-aa88-01a48811b0fd.json and https://artists.proofprofile.net/proofs/artist/5512afdf-4d4c-4ca9-aa88-01a48811b0fd.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 0xa7d41435c09fddeb3feebdface774fcb54f4df647398b236a0ae496781103808. 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/BRCMP0301370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b32aa4463b2a4313675a6556b6426dc161f7e920a594438c660a4354c6cb94. 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/BRCMP0301371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162089941e8a2c32eab5cd32ea11021fcc516003dced8e24e41ba4194b5c0b0e. 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/BRCMP0000395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6796699ac6821e5daba33b365367c2c7e3d28276d14021bdb12661a571260a7c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRCMP0301372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf852d22675528438cea49fd7a8ba66b84e08212ddc8982a70a16f777f440fd1c. 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/BRCMP0301373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95b07117e6c3af4d8b0496e9c29c7c23daf5c53039836dbf00224540b0b2ce7. 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/BRCMP0301374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed05ee7fbc7f794337fdd4f9008b7e64b074a9ac927b6b08f778392ebbbe8ac9. 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/BRCMP0301375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01b9b3d3756b7006f9b2632f3cfcb8fffc5963d0dcc8d7873864be63be3977e. 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/BRCMP0301376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf242c2f0ddb33c5cdabf3799c9fef62eaf3c23f6235d77b44db7487f595fcabf. 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/BRCMP0301377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290afd6b88003a1571ecd9c02aecef011f6f0b22172e9b10090f35146ff30660. 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/BRCMP0300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df95ad1dd9adfcb32a7362d9e837d54ba7cae2752e096702afda9de5f16865a. 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/BRCMP0301368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53db1a2c78dc275ef9a2a348d9b57a8cf29ef3f03a364bf8cd78b4540944a8df. 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/BRCMP0000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4be47102dc2800342eb452ea7ef14858c8ea2e6cd6faeaab2dd3cd7df52a4b. 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/BRCMP0301378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11feb9b45a2f1dc4fc4c51325a1cb51af3f28f25c680adf04d7ef9c38fdfde56. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRCMP0400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d71fb1722a1ad99eef419edc80e11067a1b55f8537b05206216d12598f4a89. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRCMP0400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2079d29da9ee97c3b9e876f8d8dd7db9f9e0967bb6e0203271400e97eedf387. 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/BRCMP0400276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64543ec7c08c2d5d1b87ac37f0dbe4530f55b104092ae13c0275083f4896c358. 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/BRCMP0400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8e461a12d49fc9929a927a2bf31a8438780fb298bd9a03a152a518bb05bb30. 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/BRCMP0000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa81b6a6a85bc39c6637f50c6326625c7e06b69e88632ffcbd1bbc5a5211f35. 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/BRCMP9900445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a320f78b280f2b38198f5de01c62c46a6e373d2f3bdcf666d5a3f0d34074e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRCMP9900446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd249d8afc81b064f97379b294081cf96f9730c5909918454cf4b2e9b371542. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRCMP9900447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe1539fa3be5e780aaf5de4e23955156a611031561eee24858b1b5276c0cde. 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/BRCMP9900448.