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 0xf36eee57d01ceb49b48aaa56cc596f936fc653f7976359f30ea862e5931a90f3. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05e05278-2fa7-4c07-b55c-bcd8732106c5.json and https://artists.proofprofile.net/proofs/artist/05e05278-2fa7-4c07-b55c-bcd8732106c5.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 0x806dc7a7a8d86091f1284506492d08a8d5ffbd5732917b1148b7c802ed366723. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GB9PM1700313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30518ce02b34db151235e5766008f9234d372dc5d634b6a66559f29d0d4ffd2e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ITH641824375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e23fd027beb7ca76a00e15cc0c8c11d8e6bb5680ffe7444e59a0a2d739369c4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US83Z1909634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb5dbb7a15057c5eec1a6576c7bac8f8e78ef07f55ef1d573aeeb0d6540734d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DECY52001925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afc7923e51cf95dcf12895adc38becfad3ebb5a1c3bc614bff19d896675a2b5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:08Z), 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/GBKQU2488364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e2697cf3f42dea00c946f3cc6852436a76704bed9d0c5bde06f7281cdbb73. 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/GBKQU2488363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afc7923e51cf95dcf12895adc38becfad3ebb5a1c3bc614bff19d896675a2b5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKQU2488364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8e4d96cf1dcf4be8dee68a43ac2745c8b8000ebdac79b3e7b20b0f52a56259. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBKQU2488361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6795357c19aad6d89a3501a612d3284e307a0072c441b1590ef7149e9a8814. 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/FR9W11521168.