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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd36a893fa8f46455653f434b598edc845b700dfa0e4adcb85a5e2fe429d657c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97286632-0eb1-4ec2-b711-f9eb0ee4c180.json and https://artists.proofprofile.net/proofs/artist/97286632-0eb1-4ec2-b711-f9eb0ee4c180.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c94afff5f25a7c4eb38e5af953dcf83a6f6d09759224e7183bf9f61ccdd215e. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/GBMJG1506122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bded105ff39c70b3066a5e72d62f342e1b628d067cdeaba9ca536cc42fad952. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBMJG1506123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ceff73b76ff94d82a38f554fa07b1b975b541ca5424e060bb5da976e28aada. 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/GBMJG1506124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a79f587d1cf18156cdf1d5e187e3c1578bade630ed253c28e312db23deea99c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZ5FN2154707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809496ddf257e836fba05e63e624b0d40b7f96622f129be19e800ad0ed2b52f9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USLZJ2104351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed1a288e41a851653ca0860a891d757ad1fd2cffd03af3aa50e1e6ead93a7cf. 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/USLZJ2141377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143971d24ae4eddbf762bad12612a7ddbf9e4e5ab7e32ec14334cfb74ce9616c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZ5FN2111551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b60ee17af7883d34a08500ea6fc32a857e98fc373cdf0c0f1d23bc717b6fef8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMJG2326453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ad000d0f5129688fe181b9476c4edee18f3878605bc6b32b9e0703ed39f321. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMJG2331314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a84590b554f773da119c364277001c06088b62ec2b8b376b04239c8e6c8342f. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/GBMJG2402151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232fb5c252bdb739d4226f9cd958b2e69d9f9a8c4c7bf117948cbcc41cd0e235. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBMJG2402150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6394782c6b2610c3d8d3a718c1bf8fe57874ef19d8bececfc7f14b001333785. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBMJG2420273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2153366bb60ed8d9370a4878ced73fc0fdd9fed2da94a00b1b0c9bf168537457. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBMJG2428942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81ddf9d46230b6d82ddeb397fb2b36db8c8a980bea52b88f53de283ad803bbe. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBMJG2502711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71995327a0224fe274f53c251385678f93359686839e5fe73f6a5087ec59fab4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBMJG2510130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33fd06e12780bc3d2cd5d2f17640acdd260b777c71988f7b002a1a555a74e96. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GBMJG2520323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b87c4955774642b2f00013b082e0654015f6c7ce5e3cbcdadd6b417e63e8d. 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/GBMJG2530384.