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 0xb3ea4c5397c795d18873002795c569081fd69b80bf25ffadbad7508dcbcf87db. 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/4dab2a79-c3e0-41f9-87c9-771a9b932edd.json and https://artists.proofprofile.net/proofs/artist/4dab2a79-c3e0-41f9-87c9-771a9b932edd.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 0x73d81f6658f3fd374d8490f6ec4ac22a97490e8bc496a125acc22e02e97797c1. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/TCACF1546107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157eeb629f2693c6901f13e82ce93b95865686abe6d09061561a5e3a64fd41de. 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/TCACF1546108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72b4edaabe3daa2ea411d4f499536e699ebc9b080a24db7dd2af3f114f90ebf. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCACF1546119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a124e438cfa20f061a408f1cb54ba8c05d8304123688abba0a4119984bec214. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAEF1902201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ba7d76f2c7b399693ff305e774698133b61a29dce7e77cd6dfb1cd0958ff79. 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/USDXS2006096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e08a183464ec40ef7077df6cf0129ac5882dfec2e404819462a22449a9fbf3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USDXS2006116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638a563199505e62dd8d9fe218350438fb3ffc7f56f999474526853856e3e47f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USDXS2006117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d6ce1b96510f31d07137ae3c09c4da49f7c8a696a3af0439684d856089f95b. 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/USDXS1907792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd64d615338645a3b09e0d0a3d18cff64892846f7e676ec83fb56e56498c2c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDXS2006100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65df303ef442886fa22262ac18a1f8efbd4d705b5955878703f2c3c537205fc. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USDXS2006102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4430edd0d0d4861326510f40e09eec4bba07d0aebdf373db591117a1a9a2856. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZR7E2100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fd3ffe6b62d9493e7a1cb597f09a13ad84e0aef8a9cb247732688eee430822. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMEU32209266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc70c09d3201695eb85e42a014506b2d7f86333b9efff01efd6810aa08aa4b7. 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/QMEU32218415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa1ac312cf006a7dfaf9ed8b304b211cf219f18a477d45948581fd697a47de2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMEU32218416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3825668ed0026cb3db98c350207329a6c4b57353b428fcb7d82f79edfa0ac. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZW9L2419452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e506d4da13d2947fe83f4443f54ce20790905cb8c3745f2df458b465af70c11. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZW9L2419454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9961595f041c7a2f1f0ca05f59c44621fbed298f4734f43e2f3350fb189681. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9L2419455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ee7e8e9c81af895477c00e24e75cd8452db70e0b63fe308f7378bb9c5612a9. 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/QZW9L2419456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3cd7e0ab6cf2a01d99313b331e2a13ce224300fa30117c5632e2f96be67431. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9L2419458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacabbd1b949132f4a530294dade3a5cd02128e8dbbb4c672a0336157258f0ba8. 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/QZW9L2419457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370a80b11c51070f7a110230688e086e35aaf64639a7573e313d532a302046fa. 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/QZW9L2419460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c954ff095fe85f43d2e3370699f9c73daa45b61317916d9c328d1a736fdf064. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZW9L2419465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e72274f1c06e3dee84d860f2502da35a91ec0281e502468b3e2f109ab5623b9. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZW9L2419464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9368946873edbc24c9c7672c28037d3c16fc686c79529d084676d89eb5c9a41d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZW9L2419463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ec4618e8ee954c2eded0eb0c63a8a2dabc80c44049f773818547548149ce68. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAFR2111591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6e02ba0663ab42f510177c1f38a0ed81c31ca16710aa9554f85ba309ad3b50. 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/USUYG1289970.