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 0x8f0bb7a24bb816405f5c3046bb79cd8571a817adfdc3133ba4f632993e9f87b0. 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/71414cff-ff55-4d32-b964-ca8ef2f43cb7.json and https://artists.proofprofile.net/proofs/artist/71414cff-ff55-4d32-b964-ca8ef2f43cb7.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 0x377ff74571b8cb195789e6db17604ad3b1765d70fef98c8b018ce0b39ad7e0bd. 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/UKZL42000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d019166ca3f69f1dff2b68277611e82079a7a9415c16190251a2950de45aa6a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRX762125457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa117d96ed533bf4c5c999d3b3b2f5a7a60f571bb9c851fe72dfd3658e214e2fb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX762132247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377364040cd6c0f97e71a203bd3a363c0967ac00140ab6445f570a06074e317f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRX762132249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22697681766a6fd1f8978f2d2fa91b3bbe12bcb6c0e7fd3d0f6202fa1baae033. 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/FRX762132250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d9086e7a424dd6f920ed0559b968c63604e993876bfb453ed618e69272ba0. 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/FRX762132251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7249e41cb9b5fff3904810044d445f14e84abbcb858e3852c3c9cea3fe7582dc. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FRX762132252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5902d188c76f05526cc616b8613587cd69ecce790ee1613bd21c75e98ef3a42. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX762175468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6c8ff4fc5edadf514e8b23d1da6a4777d7d2c2ff32d080423f1c4267ebed4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX762185477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5ab357c60106fce355d59f19c6aa85e03a0d390dca34aa1c99e35318409fdc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FRX872104684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd39187e50d304e0f8fed829c6a577509eb3b796457e0b5828f2cdfb9e28dd4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX872104326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad2a78e8b4b19093a9da040b97ea01a819723a51e718d443601bca26298f51a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRS182106128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a5125dd90a5c65ea01712c677f2bdf1d218e261f16e85d592a0f112c8d791e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:26:59Z), 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/FR2X42298920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef6bbe3f2bccf6d66cb9d3dd21849ba65fca1149f7e25cc777c786f20485dda. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR59R2242136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a37bd749c49c454d1e7d6946e314b83930c6dfc520aa4977b353aabc498b19. 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/DGA072227764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20c1da198a1e2c7d1ef8f7400230c2e140f9cef79b97e1c134b7f51ece6e84a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA082200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68990e5423f7eb99274be251339d075362377620cace176ec594861f924f019f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:32Z), 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/DGA0Q2376784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5786e778287400091986c4c76ec341fadfa02d46ecda383fe6ff363841930c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA0Q2376771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e37db99ce9948d1a8ccf2e9c84102e10b18d173dde1138ba187efb1fe4bbcb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:20:13Z), 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/FR96X2423866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd46c66ec60da2e53edc926587222c3c9a6f3b2233b696bbf9169e67a1e75ae. 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/FR96X2423859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7847c113e9d476813b9b3f04f6a8f1fe61dd4383be04a85cba533520c218ff. 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/FR96X2423861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b7b98f05aeb257ee5b0e5558a8d9a70abd2fbc25273db1e94c338e96d99e61. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FR96X2423863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cec9ed7ed0391ca484c8b3ca6c37b80becdedd27df3b106575d7dbc310e399. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:01Z), 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/FR96X2423864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e37db99ce9948d1a8ccf2e9c84102e10b18d173dde1138ba187efb1fe4bbcb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FR96X2423866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4f64ee360cbb528215c9ed651ba1ca480edf880261520fcc4c640cfdc22b60. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FR96X2423867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d807b919342ee179a1c6ac92e2f88aa8951bd14723252c6b002e01a3cdf33a5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA062472447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ec880ab1007619c80bd6b59db411c9adbdaa0ef58d914953b3b37897d3e8a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:42Z), 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/FRX762284899.