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 0x054b7794399e080682e3a5308e499ed45a803c67f0f9384537cb36edc65d6e2c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a31a4c03-971e-4f30-945f-361a224688b4.json and https://artists.proofprofile.net/proofs/artist/a31a4c03-971e-4f30-945f-361a224688b4.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 0xbd55909a09a7b655613f5d9d59c56bbb989dca780fc3a7e901cdcbeb4ce20b8c. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QM4DW1804532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bc8fd60d1d89de73e30052c6b5da18834b2cf963781da6d3dcec3939ba2f5a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4DW1804533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97919c7c5d127494925607c8aec645070b7c73146cd9f217a16db83223595d8e. 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/GBKQU1883808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b73b63dc5f4cedb5266a74000991f5c5e203c4342a2d3f44434d16afadc4d9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GBKQU1883809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7703eeb3085c4c1a11b1e33aac304bd71dc842af60eeb71659af309a95201cc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM5LC2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457301747c8193027d29b0d9f70ab0fa07a55d01a25b92c25cad2bc1cba52315. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2154945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ddbe7cbacb75479eeefa9fd68ba03ec859e8ce2e225ab0bc769b68d903f09d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ61910953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9f46bf686f517f9b49f969828046206c60acdab080976a16b921b49836f93c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ61910955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feba9f213b7e5574892158260e1c4af2bf48413fe3399a479ef18cb0790450b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ61910957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4ab7ea7086b8ef9914270a35d7f1be82dc1da585e98616c012ad2846d04fea. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZDA81972716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51cf816ab70fb25c2f204d16140dd9801cf2fb19e9f34180232911937808305. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA81972717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09920d9b4887b0be56ac5cb7ab0c4bbf42d739606ad2fe5f48a3194764d5510b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA81972718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d6adb1fccd4a3eff252312ea956db7f87a85e711e5a817ac977807afbe2060. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES81938819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d323603934eaae4956a80b19e61c41b76f9a0c0026d77d2b5419c15086341f2. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZK6Q1911493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ea7f0b474558933624ed51c5318d613162735d647290e25d8bde7172a5fa4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6N1916337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc990d4bcb560a9ce4f503506d3b26b07943d7733c2b76754285ac77d5cc34b12. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:01Z), 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/ARQIW2210278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9693592d7fcd990da96be3cda051923c0e9f7f89fac706d07d5d1c96e9ee0ab2. 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/ARQIW2213629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f867dd405defd88c82b39950ac92efc264faa05ceffd800e64911511a3d034. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARQIW2406824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbe1bbd207a7d53236784df02dd7e79d36c560f1901da34a6d41feb5f12d1c3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:57Z), 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/ARQIW2408764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec1e4ba38e1c21508114d3a2eca8912c2660bd912ee29c4bcb964bb35f260b4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARQIW2410586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad390897723734220a71fb765372bd8e7de9214ed600f86fa0516cb42b1255d4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARQIW2413174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb8444dcd6a5e90679083161814666c933eb3cdb31108c46a62ac12ce34c34. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARQIW2414607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd41636be3403269f353b89053cf1eca3d878db6e022d51f935c70cba63aa16. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:57:13Z), 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/ARQIW2205278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa754b560b3099c39841027916ac408f298c65a28f7015591de064a16abfcc0e0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:07Z), 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/ARQIW2205279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0311aa16f5f4b95e883199516eea54e48cd95359be4e45b24f2ed9f1c6bc9aa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARQIW2205280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226a6aaa8d8972d5c3a5485c435ec76cf645b49e8624d7f81b975b9610f72f5d. 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/ARQIW2205281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5117bb1531c71c7c890e493eadf6ef4f86de9b5ec6388e5f6b1554240c17f89f. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/ARQIW2504263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca97cd8aa9c90be36a87d26d8059d79ae1ce80f6cd6b69d827770f593e6f78a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ARQIW2506287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7703eeb3085c4c1a11b1e33aac304bd71dc842af60eeb71659af309a95201cc. 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/QM5LC2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdee060732ff2889711dd94d7de50fa783dd5bb52263ee38c9349041f986dc0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDA81972719.
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 0xd5a37917391435bb0e0148b8bcff0b8461a361128da89693acfa415ce3516398. 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/QM5LC2100101.