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 0xcba69038f7ea1da4761a8ae2ea30b4a64843bd15a91ea847d7b146cf2b0491f6. 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/cc987459-744f-4f14-8677-7e8408da39ca.json and https://artists.proofprofile.net/proofs/artist/cc987459-744f-4f14-8677-7e8408da39ca.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 0xc003cce9b2663fcd12d06ec7c76d141dfde958693a3334a288c8fc95e54cd5e8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYY2382530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc6e20fa1fd21e8a3f64fd649a7a3d60eac764968f7f8cce19eacaba271f219. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:48Z), 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/QZFYZ2313798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830cbb0bf3cbfc1c1408df8eed67cfaf7b01e432239aef06a0a976f4476e697f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:39:35Z), 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/QZFZ22308646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38ea424d3d20067376cef29f2e6621565de8169a9668e53e86691ae630f5eda. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:38Z), 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/QZFZ22308647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02eb1e346a4d20bd8b1f1ecbabde17f1ba7688a320a8aa1e881a75b08e978cd. 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/QZMEQ2458618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adc3450e90edaa69e64172dcc15a6c6f1694ef862a796dc09c6f47e8ab6d6e2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:54Z), 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/QZNWR2435569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8ac1fe3ca7acb1bd3056c85961f39cb74e3a1337882f6087b5ba753ded7f49. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:00:38Z), 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/QZMER2488192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bcc2df56ad8ef3fda287ac183dfd455f8b175cb4cfba1f9b636d9330127f81. 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/QZNWR2435572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9da206c1d7fa6a49eb7bdfe6eb305039c17ad84c75c8ebcdc978e867e1c868. 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/ES84D2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cdf0a66d5febcf45b1b6b37030253c88905024cc63c6396eb46c6291928012. 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/ES90S2101527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fdf736cd62b46cac98bae6f15c8ef5c18c6753f36239cb70d7a37e06d204ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES11D2301053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823ed7d225fcccf48e5542b16ad8844fdc146a80b3d146911bf1ee543b78ad36. 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/ES8511605650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238fc6f93671a1b565f34bc599076fdf537c667b8ff4c6bedfffc904963cc5a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES8511605653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bf28413426dbe506a2209d776ecd0e65c7b2742df66cc31ba9bb51fc10fecb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES8511605654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a494249aa3d703f55f1bbc423382c0dae5bc0bd24196f1c337a9c75a17317f. 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/ES8511605668.
Sant Andreu Jazz Band with Scott Hamilton (Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2f0d8dcc8a7e67528f8c1ff87c4a274d678c7b6d56776792961cf906acf330. 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/ES90S2001443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d55216af405076c9b7a15d3546ffabc81901889c91987b76e7f4031f8033a. 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/ES53S1902012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5562f97243494a3467feb2e99ba360dbc62d2ae65ca855e219ffa2be9e097. 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/ES8511404410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0edf984a7ce782758d9c7fa5881587e6c6be2bb1e9495fb25222d3b12b8145f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ES11D2200850.
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 0xc58c111ced84da12f984bf0ace3392e3921c682cec3728e1339930ccb3d88c6f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:06:23Z), 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/ES90S2101533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49017f884595bd5d428bb428987ab8aa0180a4cdd19ed8abc0879c1f4c242967. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES8511605662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2e0531d5e03a12688c184c5202c818482022f90a3f76ba484f54cf04906b8f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES53S1902006.