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 0x5fe6bb9d774225ecb96727564bc407aee9d9bec7b477223475b74d6e7bf7b1ca. 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/a0981f81-74b2-4825-8721-342c85a670fb.json and https://artists.proofprofile.net/proofs/artist/a0981f81-74b2-4825-8721-342c85a670fb.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 0xc97f1fa202806ab9c0a7bae0bf00eb71aed51ec638ca4d90fedc40be28a7a0bf. 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/QZFYY2130875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0da2a8a5c1d018f0ba42998ac549d0374da831fe4a771581c14ed73817a62b8. 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/QZDA62182432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea2145e7502a983c826e44cf29067f229055b231c33e2ec0221042d4e4b15f0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHN62124042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa232f0c7ae75b506b1da4f4c4b79b548350e0ad4cbdb992de9fee25ae6bc5b1b. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZHN72145267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62c59f30f22eba4c995d43dc4d7a5dc6edeb2f4405608ebb85eebae7dd3869. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHNC2190022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4789d5e5504622580261196a072f8d203477f9f6fe0bbea27cb2451094f940. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZNWZ2136239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97f1fa202806ab9c0a7bae0bf00eb71aed51ec638ca4d90fedc40be28a7a0bf. 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/QZFYY2130875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c77233767dd77d7bc39973143bc9fd56c2a28eee2a8dc4d82113216a7ba456. 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/QZFYZ2195564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0da2a8a5c1d018f0ba42998ac549d0374da831fe4a771581c14ed73817a62b8. 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/QZDA62182432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62c59f30f22eba4c995d43dc4d7a5dc6edeb2f4405608ebb85eebae7dd3869. 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/QZHNC2190022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15daf9774b6b8b23c641df6ff3c3c691df1f0551bd3a866b7a8d56326c29dee1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZRP42126993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0373c2ed29f50d902623035bec170cc67bed288f285ab9d794eb597e25bb732. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYY2206743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7d93db488b23c2fba49f90784207402106b1938ada135962a83830b5441e3. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZHN52233109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50bd9c6dc46b0fe7dbf9aebc252d5899d174c13132ce0ee788cc0e84b069b05. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZK6M2263470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2734144cab4cca4134782f1047908bc43e7d50eca315edd8749fb3cbcd64213. 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/QZK6M2266289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9771130ff995f9617812b903e8fce7b08deb325e1826e2816e4ce2c93a29a290. 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/QZNWS2295946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8916cf67938eab86ec4407f79aab3c70ebb52cc30b4a481fd8f3db519b22f1d7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:19Z), 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/QZNWT2202555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cc746e54787a4e2b4486548365491e4c309d68d512e21a0ea8361edbb945a6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZNWU2208000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb7fd2396b006ea271e45d756f1368310ec69aa1f090c1b268e23714de745c. 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/QZNWX2252769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e00f0cdb4db4d573841ed23fa5f5fbbe354a62ac623f88bf3f7f2d60ef9836. 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/QZK6M2352454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1c8fe409bc23588013a86c50a7049e53612ab6743de66cd611b7a1fe8bf572. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTB32322239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a1cc77dbe590a523931f67f1ffd1d9856f3168c0e69df26fbdabe45c57f63. 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/QZFZ72426787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7bb78dfc1b34f9db8da656e44edb01adfa2b3d7a3e6e1dcd59a932a190e6cd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN52478737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf89d03e6842e6fbd88a4807f9eee0b2fc4900b0530d70948343ef0fcb5ae72. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEQ2443834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08906fc214094d16248e6c1f1cb5479d2881247cd3666a5da772d0b504ad4b4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTB82422149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ec9b5d279862ff81f9ba9921fbd888fef3b3d061c7ea8a4ae91a81e9f757e9. 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/QZTAY2566874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e7b327b37f302a07055dfd040f70d631046dfb3f78757d661dd1a65fc45e76. 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/AUGBT2428264.