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 0x1d383f12c88f916a77a8b5f3bfc99aea10195c9e08391f39e732579005ed883d. 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/da5e4314-be72-4b07-997d-81358ab50dc0.json and https://artists.proofprofile.net/proofs/artist/da5e4314-be72-4b07-997d-81358ab50dc0.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 0x7c94f5d931c89b54d7e0d55f7e752043e71db303713247213acc399b7dc1602d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBMA22452014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229d511d07aafb1c58c3395d85e356e7195d0449d19a06208a42fdf35ecb3964. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBMA22452015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba3ca16f6d3734f11542eb3b8c0d1fa9e2937293836b351fa3c615a08d9e9eb. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBMA22452016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e8ee369b0e285ad18195d9a5ae2b4730041d82a6a36078dd45dc6cc075f06a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBMA22452017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf5f4ec7bc5c5df5aa9fbadc43a2054dca622e9a6035b85627637d16ffbfca8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22452018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eb5621b534ef29ea876fa7d95870000fb2e484012d7204b6f1028cabd533c9. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBMA22452019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20d2e4a4809a364a2184243662f9f2d1535c8365a7df16efd5988cddb317bca. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22452020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25634248acb42919eef1a17770f4379a03978580bee2ea7106e20b23fa548a19. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBMA22452021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3437c31417f33227d33ccac60ed1876fa9cca8e9f56d8a18e6ff344cd5c5ec2d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22452022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dac85634c8504c1cee827b873c5c8546ee6b98e627c338989057086007f36f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBMA22452023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19f13c447af40cc45d1ad13795b75e2fec044556be006eb3a8e49b738e3e600. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBMA22452025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab59e9762626f2b92885047b526fcc45fc938b654e778d4002d4655cae49b5d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBMA22452028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a75b88bcc74ad6ad465bbf9a7bf51f58cc4514383bd0aebab8cec0a82ed6dc. 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/GBMA22452029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651939f26be70eef5363903eac0bcba84a1a3da9bc6254bb5968904d1be232a3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22452030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53d76507628b64eb0d066bfbc975e21a6adf746a1e48c10282512cf353e15a2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBMA22452031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f9e473a1f7b8854e2215a01fbbecc57b8b189360c7e86b404dd05e8fbad340. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBMA22452032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc6d3c18a279ad3d688c19fd7e14fca437705ee9008385474dc8ba2bfbbbb3f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22452033.