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 0xc3abc90c0dd404a26e6e28ae3050f6d9b13a975f21085ec24dfff3b72c689e3b. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93e32a41-8f97-46c8-a82b-09850fc77959.json and https://artists.proofprofile.net/proofs/artist/93e32a41-8f97-46c8-a82b-09850fc77959.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 0xe91fe80e9c2db339a8761df2bdc5ebb14a98a32c58471dab1abf9fcda659ef2f. 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/AR5UH2400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5786eee474a9eb9530092879f42c10b1f1170c815434a1e2bb6b6dc777926c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AR5UH2400998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc0b49b0144ac9b8c65fd6c83a66713d14a27de18e76e64f93bbd2c59532d51. 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/AR5UH2401032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f07cb64d2adf56b34431ede2625e5de124f8f512af55ee8f1dfc594b1cecb3d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:24Z), 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/AR5UH2401099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feaeef01b45f685b8527075f5a38d8f9bdbd88db67be60687cd9b5c5493f3d2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AR5UH2401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408c5e70fcc2ab50bd309493111f6a0d6a6037c747cd40ee81707ee3226a7d8b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:06Z), 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/AR5UH2401315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8675c7d61ab1a2836b0567683058757c432d9ac5b1e7807e11fae2c2886f5a84. 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/AR5UH2503129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38438828585ef15f9e32fb94cbb7f5c4ec435aa150f036141d2d3f33fb74e2e2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:11Z), 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/AR5UH2503423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39b526ea4efb210faf308580c60a413aedd90b001cbe15484c33ae920248223. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/AR5UH2503834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa011f1edfc4321437dd433b3e992d98126d349ab28c0dc7f5f298490df7b87d0. 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/AR5UH2504497.