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 0x82a28f75f07ba42652eacc04feabf1f4bf652cd737a5527ed92124e0664563c7. 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/b25e4dac-4036-4724-bc5c-3b6fda40a088.json and https://artists.proofprofile.net/proofs/artist/b25e4dac-4036-4724-bc5c-3b6fda40a088.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 0x5acb4fd9f7362f8b5b2a36775a86d9e1b5d853caccf61ab67e46e5a2ecef9195. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BC0GO2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0eedeb11383dc0f91daa9b6dbb91c87c95ac2298cfe4d93b3ffe24fa5a67d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BC0GO2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb5ac1e36e676f1336ae635c186e3c56e862d345757bd60856cd31a9b481861. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC0GO2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c613bc6f317939a075a37aa01d41f479b27416790f55aaca793da12428d096c. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:07:18Z), 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/BC0GO2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b7dd51abfcce7c022306640fa8609163aef434310f1444c8cbd8d4075280b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXBRU2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aec4b4c7d82eeb28d7d2c507f9b7a3340ff3645d43cef5e4097992bb334d6e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXBRU2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf264ad560ac206049a72e626504c4c840071471b5b9143a8c867a132c6898ed3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:31Z), 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/BXBRU2200010.
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 0xe558c59cb5295131686c147762a55dbaecb7166129b8e97f617eb553d2be611d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BC0GO2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3212ac669eb97fab533100a1ccd6af8b37115c034a3ab3fb7b76ffea2f5249. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BC0GO2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9134bd07789ccc4ae5b05055a48ef60e87c96a7b75f7f0e7bc907848e12c91a2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BC0GO2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a375b10ef57e2832975784363519a5f09c59198c667b1978f5f419037c3e982. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/BC0GO2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceb4d15e62bb4968fdc798876d0236beee11a6e899d233232a53e4a8bdfeec7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BC0GO2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac43ea86a9fde480300111bb40bb123fbfef0e46a0ce8b57a2643dce4239420. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BC0GO2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39f451ae4edb0e016a475bde56a43a372b75de036f4251ff80ae4f25846e426. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BC0GO2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efb6f11cbf236b497e605abc82a8a9643f3d5cbd3e4b47815da465f35652b77. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BXBRU2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57faa8a6d1f54cf26019033dbb60830db63f4c106aaa79c9f4574df40e5ba382. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BXBRU2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d69ea1479bb6fd60685bc913cfae14dc561661d4cc9dac3f3cdb942c7146e8f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXBRU2200009.