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 0x506a1d104b2b86c685244e9f3f2065fdfd13d4555ef69efc8ccd697f3142afc9. 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/0e69d692-714a-4f47-b96c-94109ae8a450.json and https://artists.proofprofile.net/proofs/artist/0e69d692-714a-4f47-b96c-94109ae8a450.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 0x3a7d090590716971934e3a4db32304b66fd8afcf6d9ed530473c1ffc3a68a183. 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/QZTAU2216466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e072ed957c1b6ce143c6bfc93b6f9ceca8b9164a5d8848cdaf880219d884075. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTAU2216464.
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 0x26775ca509a876307dec093346bd18dd61cba62f4a7ea59f987ebb39e11eb7fa. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTAU2216465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8ced8b59a4e10b77a406615a6b545f58e9879c3cadb7cc78ba6298b70ea022. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZTAU2216467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6235220d6115fcf2260a2bb90223fe750af573202ae460b0ea5ac1f652453e. 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/QZTAU2216468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe803a3fb4bbb19ee875c4a6c4a5a4da84d3411b0a4a01ab51771b3a099dd91e9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTAU2216469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07529f1f1d86bbcbf7a51a725c167a92e1eb1307f6d46cb9b508f6ee83b23616. 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/QZTAU2216470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b1b55a9e54d8de45f922174b9ac387ace6377abdc9ebe4ce28fc905a30dc5. 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/QZTAU2216472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf829793ddab240e262e36b2264aaa916f54ab0dacd02f00c94744e1b35d299da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN32448398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e51b3cafdfc4b41b8550e836462066cb13f896c6912dd408f2bd9c3bbda676. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFG2316171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0266be90525e87f164843599e309844b16b8dcbb40b923a0ac135deb64f1975e. 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/QZTBB2342774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9704d807995402525a8dce8d8be6149fed1d7af9b76fc95561c0c5edc80a6e02. 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/QZMEP2125983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498a96f5bc3d1493a0eb38887a022aae735a97a9cc8dc639dfd0f1a0bfa2e00. 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/QZES62286940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0491775c922e82a069180fdedb29d4390d3417b3f6b8356ac256f694dc5aa90. 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/GBKPL2029741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c45cfba70964228a4d4a5eaa238232cbe206785cd0e89e784d9c2c37927ae57. 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/GBKPL2014621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290d33626583e2d37f47c914606e548140e0fb49c0ae37e54c02eedf0ace9494. 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/GBKPL2089738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc692c4e768555d33482a4cae6038da3fda3165e2a9310226c4a22cf16b3bb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBKPL1973035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2754544576a5936be97f9d3efde6650794dfe44b444b02f1d0e5378d1ba5c7. 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/AUPRB1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdfcc9332ad2aeb160e0772bac8bf8c853795dbdfa077708e0290791c852236. 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/AUPRB1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0051cd61845165de88eb65ca7706caf3807bbc4c7bcec7d2decee7978d4b41. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUPRB1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8c4d6edb2e9cc55b25c5d07c531bfc95ce181096dd9f510e52218943c17400. 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/AUPRB1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fcce3d8ae83f4f6aea3cea58252009ced4416b6f5ecebda3cb0a2b045f585b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:08:56Z), 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/AUPRB1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304b86239b61f6eb4ea496ad46be9c7638d7b95d9374ad80bf02443a63f121bf. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/AUPRB1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe185b45552b69ecf2026fe5dc11a22057958d05c1fb65b191167d652de241329. 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/AUPRB1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe0ee26378aef2b33297f0882da1ecb43d49cfa84e2f2f5f01d6d9c0b7d3e98. 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/AUPRB1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027391380ddb16e49b4f29e4e1e348345683748d1a6f8b09661cdcd6acfb2571. 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/AUPRB1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10cea90b102754ec068e12df3b466fe93cde49842afafb4824876a9ec2898ab. 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/AUPRB1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f4f31bf70a8150e9d531f71e1001745521caf8561c6cea09c4931d8c5f66ee. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/AUPRB1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf6b2ea821bf719a45cfb8ca498e855acd11348396de941170f549fbd27e385. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/AUPRB1400006.