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 0x93996214255a5aa67bcffd7e5a0ff301c36a13ac9a86290065da951b5d957bfc. 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/fb73f715-8965-4f99-88ac-a3fe350b5b34.json and https://artists.proofprofile.net/proofs/artist/fb73f715-8965-4f99-88ac-a3fe350b5b34.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 0xfaf9106076880dc9c009bbb109cac1c74f8549b70c6f8905cb9ed85d663000c4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:38:03Z), 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/QM4TW2168165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8788892df62e3777f479b2ca71b79cb63bb91b568fc23a2e7612e82b82e6d2ed. 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/QM4TW2168166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1d0409ac0e59897fd2848d9fdf4cf3e305a8f3615e32464f73df70157d18f2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2168174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b74cff6c1bd9ecb1bbf38834b23f75219a3e796b69fc2c2651c2290d0fd6395. 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/QM4TW2168177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2e29ca39f507c3a832786934ff56f367077290a3adbe3cd907e978d678c750. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM4TW2168180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a570af7e853e15b68b309cf50f87e0acbfb4860d6c5b6f9c6778979595a447. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM4TW2170320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1e22fc01359f455fd65f7dfe69a3514d9148310cc95df13d42a7f7a3e327f2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:49:48Z), 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/QM4TW2170324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9910500d5b4b9e2cd231af4940d29d168ac328c697ef5486cfa70d5567234e85. 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/QM4TW2170326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17617c070492595818f3815bb58293c15cf00f35cf2bb9916f5fc6254554a128. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM4TW2170327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ef4d4819065e52d9e76e708510e125073e646f41a06a844e330112a4e7e24. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:27Z), 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/QM4TW2170330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41f402b8b6b380c7eaee8b32396ffa647a8997135f2d526ed97b70e899d39ab. 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/QMFME2161234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aa9e7c96b31e4412c5dfe2a97347557bea18a2ad26e249185c5f94de77a6d6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMFME2161237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616a0cd05bc7ede90ae49b1f2b8748622e9f311052000cf3a81825fd5af2133f. 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/QMFME2161238.