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 0x4730da0109ed6818b9e7d96737b76dfd6f6fa55623689f9eef4b62c69a94109b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44c63f4a-9f33-4305-9563-0b211cb9c83a.json and https://artists.proofprofile.net/proofs/artist/44c63f4a-9f33-4305-9563-0b211cb9c83a.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 0x33a53d2256f9225928912be806feb8d72ee53aa0aa1da3571554fc0faca1de6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU7505861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072aec01af67a2243d4cbc7101ff831be0ed7c5821237a4fc293aa67320a1754. 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/GBSMU7505862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1999d1c8ed5a3ea5473ff74a4e4796fa896990af90a31ebad57d800384c9815d. 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/GBSMU7505864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8af4bd5c283189cdccc4e0b9373e3b997ee9ef987af5695128e8187473511f4. 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/GBSMU7505866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99bbbf0e5ef62608611167b987f56a7742b942929221cfe61313a240bbc4dec. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBSMU7505860.
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 0xf7ee4d233544b64ac4127458a2b6c7416fe63a65f6959f377d91cdeeb109f02b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBSMU7505863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0c7640e1e480ba4d44125f79256b5566f78008bed17bfda822f8f9af074c0b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBSMU7505865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d2837ffc92371270ec54cfe12a4d5cdd8b5c437994b06cb4703224f106db83. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU7505868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbea64cbf76d1d80de80a54edd2cc384355f2ef702ece1033b151158a422a5a8. 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/GBSMU7505741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f985890408119befe9f96d6750abe174fb95033417f360f2896a2a02571741. 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/GBSMU7505742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010dccb18009c9b99dadd32215d02a5a947d18a29b9c81e82cd8854a5eab7cae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU7505743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c548ad60411bac15b8e5e44ed5d4109d79865353f8bc1359fa392b567f51e6a. 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/GBSMU7505744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674f977724c5343050dbdb4ad55cd22f6113565efe7db851d1cf13738ccea62. 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/GBSMU7505751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead4d6308cb18af7351461c7893d50dfae72989dbc30d66c16f91075611420a. 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/GBSMU7505753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb235081e0e0c876532bc76e8fba03c3da6a6c4ff6a6daa161537e9a2c37032fb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU7505755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc866a1847cac75d421969d4d57f2b8cca715921bfcc870f88f69587cc462954a. 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/GBSMU7505745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc059076f7e0f8dec9b505d4925c1db1b50c8df58ffb060502372af4d066944. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBSMU7505749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37475ddd1e81049a8ec0856be6d5b24fd57b9fb017e794ed366f2ef68aaec725. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBSMU7505746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaab30ef16db45cd98239de3c625d5acbbcf5173738f35d528ab9d568de2e8eb. 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/GBSMU7505747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f490efae0d499d802ee5dcedf3b7c010febfe7e07b970a06578dc1dd42bba4c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU7505750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c73cf68680d441a64e8de44d3fffd9e66a0e7c26152122144fba22402c014c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU7505752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2599cdf7da881808f4b6164766a3c0aa5831aa802226125524f3a514be5c7fe4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU7505754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b754f5f404c8f70ca9c0b8681f88e78f8adff14aeaf9b5f5a9b7130476cc744. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GBSMU7505800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb090e614b8f66e9710452bdc5e1ef34b1d33054fd7fb61a2d8d15b9f8385ad. 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/GBSMU7505801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d54af086000850d36985b3f6d764f368b4e136880e9892c266e565f5080a4f8. 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/GX8KD2383779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444720c66de7ee2cdf78ec0b93444cbf95e3caf0e58e1a1f8f90254c9a861a5d. 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/GBSMU8259101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce57f40417e437f31ac85f52d5f26486359c956460755f4e1a4e2c160f4b51f4. 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/GBSMU7962655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d240ed6d2a07edf6c44058bad965932528bf9785221502df649f1c4e9bb12d9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBSMU7962656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc8b238ae57ba311dbac430f657cb0442c128aeff46db46dac2c46ee7e4dc57. 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/GBSMU7962657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9deb8e4f1ba065ff19ac3df749ef5825c17d2f713fa62a3a1f6e24262b720f7. 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/GBSMU0035014.