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 0xf27cf4e613c4d9b81808a336b1b5b26da4311b6a826f31176fc1f3f1a643f939. 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/a6ee8446-f26e-4425-a103-1106b214106b.json and https://artists.proofprofile.net/proofs/artist/a6ee8446-f26e-4425-a103-1106b214106b.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 0x174158805681f61fb0fdaf3e583f6297203773afe4bbf135d6be22e2c5fa6c80. 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/MXUM71700463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a4dfa162df1af649814bfc2ad7f526848dd2ac9eba0144616d3865a57114c7. 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/MXUM71700464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388138a7117f87c134e945fa97ddea6facaeec0ae43143553d628197d623da7a. 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/MXUM71700465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bef453b4c7da224a7a65407468b919276dc624754fce343a6a15e987f65bd8. 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/MXUM71700466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcc88acf7e3828133786c0ab8ed5f7320f1123b102c2dfb92fb4635acf7e900. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXUM71700467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe0f19fb2f5edf01335cadeb30947ea2229b64296c72e22f3d59261d7067cb. 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/MXUM71700462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a30e1c90394205b9d23a4a291a6c5575b404fd49cb07ce76328979ca4a08bf. 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/MXUM71700468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b383af266e3cf8b35e2d6bf5df0dbf4d5da3e0aecd0de86c636674af3e737a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:57:59Z), 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/MXUM71700469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7ecec4081c7768411604899a3c32bd1e7a73ffbcab836516bfde90d7cc6f7e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/MXUM71700613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab5ca90823535b1bcde19569667d85037b125d8131cfce79e5a758d5ddd6c37. 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/MXUM71700470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2fbcaa775163086e519270c031cd6a382420a2d87468071b2574b3f26b498e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXUM71700471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5864b3263c5bc36980e16fac94f6deada771b8e62694ea639a46c0e35310d665. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:05:34Z), 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/MXUM71700472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8909aaa1a6fe37b541a172e15f6692edee49eb724e77c02f42354c2343e62639. 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/MXUM71801381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e699aa09b11aaeb2b757eacdd6813daa4ccce8bdc49b066b46060837f6bc4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:25:50Z), 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/MXUM71800144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494fd0d526be4ede96850f85979de46b3de65b17bb942ad114cd51922aecf4d. 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/MXUM72000786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29afc66e78178592903056ee61eb9ad594aa07f0d723cfd7af38d424d7fd3955. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/MXUM72000785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbbcceea016b45e4cc8e447d1a24b74c45255dd186876f11a59fc51543928fc. 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/MXUM72000788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d4e7707bc9a83b36ea46c470eb06acf120aeadc52acfee981f28359f780437. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:50Z), 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/MXUM72000789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d66ccfd6239e375fd6a583cb281e62e056679593adfce2268ae6e61e30e80a0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/MXUM72000793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b0cbea5f94269a5b355c9c555e9bfb7acca8d8eb230b9d63cc26a458197400. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/MXUM72101967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8727f056939e369afe69760bd07b3cd3476cbf44e02c36a6012868161717e63a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/MXUM72101964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17b32377213d4183f5ad77d07d45bb8f1339e603cd1bb7f0dd5dc465361e67e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:29:36Z), 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/MXUM72101965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173d194a8212745525f6ee835cd35875dddce5b8b13d77afb3c1edab5539459e. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/MXUM72101966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52425870fbfc6a111189a518a079676dd685049901b1e0118fae3997a33d70b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:50:27Z), 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/MXUM72101969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9655cc788893c078782e695d45d9c3283362bd894abfc3a69582b15d4cac7d39. 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/MXUM72101970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510d6e7a8e75242040d1f8f38d9f69fe19a875c5363e605c6e9cca9accf572e8. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/MXUM72400627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8114c94b5e0848d3399925eaf12b6450898c960b206c868ce6d17e88cef7ba. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/MXUM72400679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e123297123fe8b6ed6b6b875ef4654b846fc14068a4f7fd9eb2548f7c13e8c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:39Z), 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/MXUM72400683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e71c940da5389d2c9c29bef1a62593d64f6472d98045f2dd9045b0ec3925c92. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/MXUM71400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe423980a46ae4cdea4c0b9133d6eca7f63036881a2197306c33729dc4cedc3fb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/MXUM71400022.
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 0xcbe69dffba5d6262e16f9405c88a80132ac0c5d483b03a58d387c83b5643ff2b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/MXUM71400025.