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 0xe3fb2f4c00782271a1780cbc627ffc9587a660adfa1aed7f594f515d450deec2. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9e5a8df-d090-4e93-8e81-b69fb0ffc20f.json and https://artists.proofprofile.net/proofs/artist/b9e5a8df-d090-4e93-8e81-b69fb0ffc20f.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 0x3aed4d8f282d8dca872d38d08640032978e19a0e68049eb1c841e9219f8f951d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPU802300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eba3f6bb100a4fca79bc33ab9152fc2d89e8e9be9595b19967de996994520b7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPU802300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35d2a8bba6f4e8540253cd054eb1c5da0163819ebb577701aad3bf5599e056. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPU802300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaa85265f4519f736fdeff5aa98e286b640919c04a0ecd4a6c2fc79a599d689. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPU802300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075c7521594b0d67f2f90c8952b6853ca6c3009e736e01ff7c12bd501cc50b4f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPU802300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c65a7c380fbb8672e24642bf0cd956a98c5099da40c6e223b19cb51a43e862f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPU802300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34829a02eab821a03b0a0269e3716e8491e766be82469b6e918fcf04064be5a. 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/JPU802400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3400535a205968c6a3c720ae053617626f152497f44d11d495d66863985b2560. 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/JPU802400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34829a02eab821a03b0a0269e3716e8491e766be82469b6e918fcf04064be5a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPU802400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cf6e48017f454c3498d6ea5add1511a6a1ff14487ae3c1ac5018d613fb51f9. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/JPU802400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f7a5bd32cf13d66174ada7fec81386e086e026381a18b84c40f64b8f56ae88. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPU802400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0e32399555d097d196813d45b035a916e8b4781964db4a7ccbdeb7a3ef7b2d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPU802400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28533bb5044c7a39cdbd288279290a9f7c64ab7070c14b0cf13b4e51b241fcf4. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPU802400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29aa8890142f651e51b074d82aab8e6275b51f94da0340c75b2b82c0582bb11. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPU802400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf55914f5f77c756bea833fa3f67a99f116818bb5a6c4adf5831bae270489d52. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPU802400038.