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 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 0xa02edcd0822039f5963d5a6cf0698f3ca80104fad9b1bd92463ad34081ad96dd. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae20a9c6-93b9-4841-aaab-4d988f8f7ee3.json and https://artists.proofprofile.net/proofs/artist/ae20a9c6-93b9-4841-aaab-4d988f8f7ee3.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 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 0xf6b3b767a646e8cff43815ad846e82f31ab051a871754d80d84141848e9a8023. 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/USCGH1661908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9062939f7e82ef95aa21b836e5380a3ae8e961d103ff680e7505a8af353a3fed. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCGH1661909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfb92c6d9876acc07b213b93f2874bb939561fd405be19b66cb4a5f92864108. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGH1661910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e34a585cc63a7d30eaee3dad9845c8eea7f5d2c171b5f64383f03b1bc0fcb93. 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/USCGH1661911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa304e451070831dc3d11b937d80f80752f040dbad20ca97d6279ddbbc47d9525. 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/USCGH1661912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c43e4c0cb534cdb290038bd97304f2c02b7b40997f9ca3e10501ff3e9ca361. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USCGH1661913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f813c45dd36292788ece8880b3405c0eb73e195bcfe0eed7bb8de4b1dfd7a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGH1661914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1697102fbd6c1d5a3e962f678609b64758567223a5e82e1892720bb2f6081701. 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/USCGH1661915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819743780f935480f00fc7199e52c8dab4f262d06834cb94de686c1ba9b57dbe. 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/USCGH1661916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fcd5d1265a8d7a56dae3328b0cbeb01c04b5a819b3affe2fdd8dc30b087189. 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/USCGH1463420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9aae82c85bca13007d2ee51bbd3bb5cba8e66227d591741d773697ef61481d. 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/USCGH1463421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5333197ec3abe5ddec5794f40e29a9c30f71bf8b331fc88b82cc218a8b4ff797. 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/USCGH1463422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066604910e5b5dec1294218d0639a81c439ed5dffdd904850e5f2105f13f3620. 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/USCGH1463423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da2b10f997b436d72b6cd0923c01ca00b35851563f58d164a3d66e2002bcfd2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH1463424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4faaa662cf60a30875b0019bf99812db6cc6c18f5b31dccc98750eac084b69. 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/USCGH1463425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94359ab854b9af40cf2cf7fdf1a146c72a2680b2094780a38d88ca7351416b64. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USCGH1463426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9fcee10eb6a955bd275ef0ed92b13c3d41eef7a871faac6bae359220a9cc9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USCGH1463427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba37231599bf063a1ee806e2df18fcfd8c6377162174815212cc98a7c507d1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCGH1463428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0107443b920dba2dd38e23efe02204d805f15897147b86857ba51a3911dad1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGH1463429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72debbc8b3bbce6c87f0939ac0e17426f4502406556be8dd92e86a8c25e7ba84. 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/USCGH1463430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2952c3289563207dbc79765764926b392cc437b7a8b01c4d160a8cb75537f44c. 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/USHM21146536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c727f83a492e84c3c9e17824374c03f26fce2bba8d37bc6879b1391e1ec0b2. 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/USHM21146537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed4f2cafde11b63d3551b4bc13cc124fc22aa2ba0f9857d51002b1fc7e3fcd0. 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/USHM21146538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21a8791e25c65a87499c906bda9bce957afcc3eca77f5243c9f7e33d8f5d43. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM21146539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982d9a4df1f2f16640279ff5eb4949850e88a9ac43cca62b8b15dcae494cf3df. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USHM21146540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3926ae32c3e1d587bf834db3a336d05dc93140c07cd143701974421d030185. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM21146541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa6a87345838a055fc598d147a3bee8c18de6d45781a6c6a659fd266c3e75ae. 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/USHM21146542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba4f52dea89dca478d3b8528fcc5fbfa537cd0d2aff03641f6d242bca9a9650. 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/TCADQ1804580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcae6cb8c812dfbcfa9953c524533baa04ef2b45d9a88f91fee13a3f059f55f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADJ1780393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f768540ddbdd4788ac92339b5d074ab9700c6f633ee7ddeb3bd97684a55333. 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/TCADF1785946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689a07838317a5b46b11a7b14ad4a8e3b4fa164ad2b8bdb7e763f8fb29a5f980. 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/TCADD1762945.