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 0x2fd8ec153ff376719ef24d2037a1100858f811b5febdd796bd5656fb3c6c2824. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87244a10-53d8-4c94-bfdd-f7ff1dbaef52.json and https://artists.proofprofile.net/proofs/artist/87244a10-53d8-4c94-bfdd-f7ff1dbaef52.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 0x3c20d40a75b60e7daf75bf1e52b87d3fe6e834b1057820c3014a88649934cb27. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX282084303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9c69436a48ca122b9f36a0c68310417e4e35925b33a6d5c116cfa85e7a8359. 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/FRX282094348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a8161fa8b844529b4130f98fe9f08aa54782b7255715a79ab7bdeef069fcd6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:39:32Z), 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/FRX762141050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a841470cc008fb3b95a61a235dc5b7f0a832f003746864c46ce03ad11b7a543. 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/FRX762140344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc408c3ded64e6d4af7500b0301c4e9a3ea2f250e56a274624b52d7d50bb492a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:44:28Z), 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/FRX762141048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3dc87c32837236e35bcd17d5c70d547c80a54dd6bd1ef9b0e38a6c2dd29794. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:47Z), 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/FRX762140166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da6a82408ac47c9a6c1eeb2d20fa47c27928aa46bd778f34e6ea0d9c084925e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX762141047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47cefc8b0b06484c9dd9243cbc4f24edc77804a05ad34190fa2a9fcbf62a965. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/FRX762166561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6804ca530334ac43aa323b0cc8ef5b5b7f6aa187b125243093396b265521c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX762259155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3e78f721f74353a2737273ca4772d9ee09e41775a8058d4d8af1dba35ab06. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:10Z), 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/FRX762259160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66250f574f038a3b9e70762d47c183d6f96c2c6495913459263d02051da57200. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX762295175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffbdf6a97e6899a07180e46434e35db60213eb12b0e24f4ce739dfb86a35c78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X2355773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbff4c042befa1be36529452610f5bb85500f43fbc072b721cb495f799ea2a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X2355774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3cf5ebb0cc53cef955480877143418daf3d0444e2151ddc3e2c169eefd7d35. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR96X2355775.