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 0xc6c94fcdc58deddb74131843148d616a0ac7d28e862fd9472d76a44ab53a8c3e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e789ec80-c902-4c6c-ab58-644a569402da.json and https://artists.proofprofile.net/proofs/artist/e789ec80-c902-4c6c-ab58-644a569402da.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 0xbe45415f90ed0c06744a755346a1273fd9b1ac60b0e45eacb9a4bf8a7d1619b3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/UKXN22516626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8712f157f75431439aa8004e91b37c3ea88b823da7a8a2420205d41ab0b4d942. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/UKXN22519362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23524dbd2dfb8aaaff6325afe492ee9911d58f7e35521e6f87d4699bd0e62d4b. 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/UKXN22516625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a60b147a53f3aab64cc6e543f063e44608098c6fb7777bc85dad929965909b. 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/UKXN22516628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977616a30c61b9169c7bd389f822a0017bfcd0d5ca6f6c3adf5d87b6d63e0006. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKXN22516627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331dc103f01e6f19b7217a0bc1e911e61fcf719cc3373e40adc7fb3850261648. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKXN22519363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ad0bac7a54132b0c08deedd05012a1bd40d76a66129a5c4de5d68181d8af2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UKXN22516692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdede0653caf1a9ca64b32b4565c242d798d95c38522f2ed91d946f0a3a2dbdff. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/UKXN22516810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7c75d88c9626e2dbd184c351aacf657a957acc31553cfc02d74989a0729826. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/UKXN22522577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ea7f1cbd997d57f78a76e5adadb04009b156dad001051b8dd218e966f8efae. 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/UKXN22519933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8aa8e6ac3833164a075eb9665e652918f575a3c35f77ad7bb481766b6a424. 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/UKXN22522601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff33cbdb854ba122e7d0e6f734bfe339180927da2bb39fad7f8bef4d09e6ac3. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/UKXN22522566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f3600229e3890db138b32ac7a4271d6788d1b2cde35344d5813f89f60501ce. 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/UKXN22543833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee150346fba91a835261ac61a213795e2309cdd14daf773d1f67d301393f279. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/UKXN22543808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f5835b00f1cddbc0597b9913690567c57622f604661b6b76d1729c88dad507. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKXN22543797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14be97e24f9e42c4aebf1f8b4b50dafb83b189001bda632527cfe1c65b282a2. 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/UKXN22543796.