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 0xa3031502983a037e2f21cf0d253191485d1b6e7bb982acbeb2b5670e7cb666e3. 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/25e1ff91-3b37-40b0-b98d-1f7198a58eff.json and https://artists.proofprofile.net/proofs/artist/25e1ff91-3b37-40b0-b98d-1f7198a58eff.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 0xaa3333fd5baa8daf6407a8e1d983a61e7cc916d31705bee4689de8056b697cbb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBM9P1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714d09798a2a8b68a2bd2ed6ffb950cf07ff7040cf673fc5bab2816fa9cd6136. 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/GBM9P1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e502b9df09d2f55c67f826d99454124a848e94105e150b7c1b7edb43e6c1bc7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:23:27Z), 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/GBM9P1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf664f2b7e89d843489f30b0f2095a93634a6f8d3c8647a589f018c6981bf7b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GBM9P1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb163f5fca260e5955a791a0e12ce2dc00d0e0c0d5af86695fdd4ea21aab0ef3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBM9P1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b39fa5fb2feeb1b12035d1143774e1d93f624de57e7ee9162d5c5132299a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBM9P1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec9b6459fa59db6d8c8599b7460d6a2d578e32e59b3cce94111f7216486731d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBM9P1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d7d8122b789aebe926c9db37708c862edfa5cd6f34009dd7ab47ca040ad71e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBM9P1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a99cc476825ac69502eece101493f81aa4d1f707738584d708c88d82bf3140. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBM9P1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b247b695b20073845047c6ac7d9f5c5c99e229d0f4cebda33967a1d5f26201. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBM9P1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ffd51a46ec69382c1af84882c50326e3a0eb0b7dfc74d472dad722da4e5051. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBM9P1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a35c74a42d3558f17690cca9e5c8a06d5879544dc6f4bbabcb6d214e7144bf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBM9P1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4267653de41774464d8c1f5693fe1728b6548edba22c731b77c4936f3879954. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBM9P1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62359af9ae42e75fe81ccd20d54e10c4b0b65977421aeb436ea1db5b490ddb5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBM9P1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936546631ffd1a6d6bf10f8655003eb5e15eff9ad4c42125911fdcc4cf5b9eff. 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/GBM9P1800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936546631ffd1a6d6bf10f8655003eb5e15eff9ad4c42125911fdcc4cf5b9eff. 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/GBM9P1800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3105cd9adb55f84822b995bc6bfbd4fa475c949c3849aea575d092ad2c5c1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:24:54Z), 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/GBM9P1800504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02e903a233a486810539937472fc7121d531d47ad411425fb51b383a0bb4c32. 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/GBM9P1800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a35b8cc235261a46506493fd8080f201cb87b6401fd32e19571459eb13c80. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/GBM9P2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae2f0be972fe1c52027adbc8c9857512138fb4509b5eb1a2460eb613a94802. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBM9P2300012.