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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3333fd5baa8daf6407a8e1d983a61e7cc916d31705bee4689de8056b697cbb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBM9P1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714d09798a2a8b68a2bd2ed6ffb950cf07ff7040cf673fc5bab2816fa9cd6136. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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 0xeb163f5fca260e5955a791a0e12ce2dc00d0e0c0d5af86695fdd4ea21aab0ef3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/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 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/GBM9P1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d7d8122b789aebe926c9db37708c862edfa5cd6f34009dd7ab47ca040ad71e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/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 953536 (2026-06-13T17:25:41Z), 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/GBM9P1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a35c74a42d3558f17690cca9e5c8a06d5879544dc6f4bbabcb6d214e7144bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBM9P1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4267653de41774464d8c1f5693fe1728b6548edba22c731b77c4936f3879954. 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/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 956551 (2026-07-03T21:18:05Z), 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/GBM9P1800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936546631ffd1a6d6bf10f8655003eb5e15eff9ad4c42125911fdcc4cf5b9eff. 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/GBM9P1800501.
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 958331 (2026-07-17T00:15:53Z), 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 0x620d583564ab50a45a3514d739d521cbf406cf6aef88d5643a82e49b0ddfdae4. 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/CAIM51600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae2f0be972fe1c52027adbc8c9857512138fb4509b5eb1a2460eb613a94802. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84902ee38c0ea52a4ca7aab50da61cf9adc32845daf4e6758b9dd999998d2c74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBM9P2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c29f4a0f9b5854c44d6da73bd0419f233a825b7d84b3b86556f99edf44684. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBM9P2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7250520bd1f8232843f87a70d357dba9e025fb1ca28b64d0a2d0d4925ee5d942. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBM9P2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb722d897c14cc2a392d1e330899afaf0fb0246b96bef5ff1da897fb177e62633. 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/GBM9P2300011.
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 0xc59365054efb2adbec82020f62fefab6b87f97a744a80be166c4b6729021ac1a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBM9P2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497d4cefca5e6e17d220b6cfb3cfe062f96a4662e324dd333ebe0adf526c8f2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBM9P2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb389d30686936b3f2efd54991b97c6334d7afac5b3ea333051879bfaa0a32baa. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBM9P2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b016875ea5f9724527afd89e4678a201a172035260e92daa026b924f11b550f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBM9P2300019.