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 0x33bf155f9f3a8daecab407e7db054abe3c97c6a33ec1070afd9afd180209e90b. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bf6a0e1-fde5-405c-a285-21b44d7d33ab.json and https://artists.proofprofile.net/proofs/artist/0bf6a0e1-fde5-405c-a285-21b44d7d33ab.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 0xe22816f56618b6d2cdbfc9c81c3b642d859e7553bfc5d3424c3dce36f930e340. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BX4IU2413718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e25198ff8201868dca927dca878f0d57026a7eadb639b6d645e61a7cac7a68d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:25:05Z), 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/BX4IU2413720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fed89ee64f5548b8c763784dc5d48e4c5d957513218e86132857b947b6bf08. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLS2001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8752222bed7bfa058abc553583c9fcd2bb7c4752babedd744f63050bc8d2cd7c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZW9K2318347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf402e8e451dfff7ba9b9ea99a87421b45b11389380d618365d5298288f7fbcaf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZW9K2318349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb63af9eb8cd35a05d02fe87a9abc21d08007c4e6d04616d10fe196541f990. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:33Z), 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/QZW9K2315936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9675bce1287adc4bc6982936841ecb6cdf555aa2b55f214685e495c94d57840. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZ5AB2449284.