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 0x219ec2e8b45555c6ad6c45d88dadd7313d1f7e1b5f4e6d8c9374cd7e82c2b069. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf72553-11df-44c0-9fb9-e584687c8f16.json and https://artists.proofprofile.net/proofs/artist/dcf72553-11df-44c0-9fb9-e584687c8f16.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 0x0e195607a381c22340c1647e4f68c707f2d6aae0e35ef79f616d033a13b4d403. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6J2217872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7e64145254e7fc137cfbc9d8130e612413fb2f001753d56ea0b573eee9a408. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6J2217876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644b0c5001ebfe633d76791cac2e9f8d32983dc7a40f3b1e650aac9c584e0a09. 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/QZK6J2217878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b4153af55d7a07e5473ae6288fc9c89a7cb4fb9889a8e7506760d497cbbaad. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:47Z), 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/QZK6J2217874.
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 0xaa4582b9a698ca2fa771b51ecf30d3f3abed91d4dee2d96d5a6004b12852bdf2. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZK6J2217875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad0f4c0d91ea3a684d80b6a61e9a03a35d9db4d9ffdf951748d2d13407932f2. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZK6J2217871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0283936d967b21b65f70387bb5ccc424fca462b5961056d311674979541999. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZK6J2217873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e68df71c4deb2b94d2d6a4074c7d8acdaef887cfb07bc161f9d61140b61aa4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZK6J2217877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ffa2ef6a7079c208cfe9579d762194c75f7b5383c6b3b97ce863c1a93b19e8. 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/CA7912000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b3067a13ba3b5e5bb25c5a95f585f02c9c6f6249ca9409150bc485b894f158. 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/CA7912000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28242b7fd9fd8f61af4cb77844f5a4737512cb0ed50797c1761df3f824f9400d. 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/CA7912000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0684d781ec65d4afe8deac2cf1441dc0c8f9d2bfdb021f5bcbfd25f7928ec485. 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/CA7912000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2647b274c8ca14cba53749f0a136436c766a8e82d670690f36dd4be764e79fa1. 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/CA7912000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c520bfba732300286ae0c2d2d75c896e95de514ecf5b6ac79bf0b373f3f3fc3. 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/CA7912000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ef82a5bb2a9bacc743a70d51a908fa8d0b2972529989d41494053547aafbff. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA7912000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97705cc4f35914e5b9e0df135c9dfb46440e89eec45063bb6489f0dfab3ff322. 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/CA7911900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e23feae445a819ccaeccc719ead6e84263dceeb0d83fe8167e6920220ba159. 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/CA7911900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937f988fc1747f30d57205f83f59bed29e5bab7063224cfb318a7062a12303df. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA7911900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fe97c09ae3d1c4d48e2757089b9e3fcee5559a6fe431252d46e6cbe6dddc18. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CA7911900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97546c29f69370f4ad37f219eecedc5af233aa1687d61cfe0f7c31b0ab8afba5. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/CA7911900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf329854e77801b464cc6d8d92bf962b4691e8d435d032f3321c9fba74f7c57b5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA7911900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de867d0161c80c14f2830022c918cdb91d1d13e466c2ab32242db117c2b5ad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLR2431436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7e8f65d530a949994917be5e9a16ed7ed22e36af6494cc100caa074ef6df8e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2443439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043e7a240c385b916de12fe5bc507d3c3135a578bde1f37df815e50a1dbd8f74. 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/QZK6G2311148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77a1fda9869fbc22593d8919b77aab548bc32323048ead0646d3015d4c2216a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA72235494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502b3ad34f3eda320b6cae36a706e4f403dae0e9efbaa720c1972c8c62179e5f. 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/QZHN62180487.