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 0xc7cd3bf7eb2b653cda08c940ab4b941b21aa248d9b5fbe208d4e1236654124a1. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89d94004-d63f-4ec8-800b-cfa3895e0782.json and https://artists.proofprofile.net/proofs/artist/89d94004-d63f-4ec8-800b-cfa3895e0782.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 0x01fa1215077a2a99ba8b6eea054e060a5d8b592c52ba48fd8bef8e60af755a96. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:49Z), 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/PT0FP2000847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4a0a747200f7c64888ed08ba875c1746ff0535400310a3cb1a362d59464890. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:39Z), 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/PT0FP2000846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad3e29cdc7b15e04ae9e4b8b586017f71c4723bf385b25e8f623f4e47df194. 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/PT0FP1700331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7836a6d116b599847a27c526b8089ec43fd57e4681133101e4e0a8dfa15c0a6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PT0FP1700334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11fa5d59bba02dc927b5a8562dc19ae8da8744ccea5f4b6f37818262b4f654e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PT0FP1700335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa75733359aba3e130726738d96b4a3cdaa1946c6781d7c4336da8960799738. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PT0FP1700340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80584eae5351d034570dd9fb8306ae7564edaa9d57a05dd48d2c6da2a6857b6d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PT0FP1700341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6638ac81c18e9a6151956b77cc21b8bc56424f01e8b0ebc05beb7202c8076ed6. 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/PT0FP1700342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20abf198f638871c27aec0a5b9dfc12b3bd1f25bd94939de639a2213e611df0f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PT0FP2000809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8d8dbe495a7fcc63f5879c42a28c816a7a52fdf3fd95b3bf908b509378ae84. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PT0FP2000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf276c7d6319134e6ac9db9304f04f72ac037a40a7d6cd5790dc2695dcb5308dd. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/PT0FP2000812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf1e8c1153614891e229264eb7da334a82cf4f939bdd1c02fed1aa89a9a6c9b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:34Z), 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/PT0FP2000813.