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 0x334ce85299e5df95a780ce2df9d1491d6c100718512997115729795d4ee0dc49. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17995f0b-6962-4f2a-9658-d4dbff78f0e1.json and https://artists.proofprofile.net/proofs/artist/17995f0b-6962-4f2a-9658-d4dbff78f0e1.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 0x32123bd85e568e28a472999cfa73121fd5f3d2b84fb2fb35c9595422da49174a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6J2459840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48839b4031f0f0084b3f2734a1ddbbf40d8c67acec3f251fc008623b02450719. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZK6H2415819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d67208776d381b8684f746c89d92d9588af41b9b940b50e40434223c6154f5e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:30Z), 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/QZK6F2428304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05287715effbdf2013777e7e8ad5691a2e80cef216b7b13ccb338a68839caf03. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6J2456396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbad868f68c0cfee4d7e937a4de0fda7e615e21c6ef1b6d4f4bde9cfe316cce. 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/QZK6J2478349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90e8a065284c67de78ff0302e2197f88494f839e0c1ef7dc330c7eb502ebe9e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6H2409350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa405c0f3e5bb4e79442c663d9019c0b4818bbc40ecc4626914a07121ba727177. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:31:49Z), 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/QZK6F2436080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ecefa9a8d87773385dbe20e11f65c834bfd78ba9499cef49dd743d33cd4e70. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6G2442385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7ea5e1be2da2b9eb5087784469fa7896100db1fa4d0a071ce25cc0b409d6b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZMEM2407957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef16f9b6052ef2ca7401e6f8414f5b2ac9de08ebeb15e4e1df6064ad0cbab7b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:12Z), 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/QZK6H2491725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2e10f947b36d2f949c967fb2d5bc08807d0e63a7bbc65debb1234a2888b5d6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:03Z), 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/QZK6J2403003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16e9f64d97f52f9c50a19661042a1d3681b78f58d6f5ba256dcfb62fbee3793. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:25:34Z), 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/QZK6G2420764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1cd37d19c6374e4a332f38d94db483ad4035ff5608976825d59d99c704415. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:13:28Z), 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/QZK6H2436828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fadad7fea66ddc8b3a46ee567c9c1d5215cc15d8ebfc07532099667ed0a144. 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/QZK6H2459542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a3925fbcffa87cbcd9fb91b6ce1c73f8acad8fca88fc92b044b4b772275860. 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/QZK6F2474514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09d0363feaa6a52b26d367c8ab74aafcee7e0f570bbef65700961b316c8df0d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:47Z), 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/QZMEM2411836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b92cc4e7697f2013a3b1487f6213ec78dd347d491cbf08c6eb36f8761d1def8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZTPX2408424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6638fd366b7a071b9beacdacdaeaaeb8a4c5eba006e0c7214ae5c87b5a9b2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:32:06Z), 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/QZTPX2408426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba519ef9a88d765ac2c1920d0b93aed10a0863d83f7183c19880d2cbc8b4c7a6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTPX2408427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d4829ce9c5e4cb3f73984b727188dc0eb766065baaea91816e9c5fe9df8551. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:25:46Z), 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/QZTPX2408429.