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 0xf1bbbe029a5a64c7b34df72460448df388ad814b27c94fd05ac920d79d94a59a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ef5340e-da44-432f-85d5-0711bc8428d0.json and https://artists.proofprofile.net/proofs/artist/9ef5340e-da44-432f-85d5-0711bc8428d0.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 0x2366cb9ca3d6c396e46c746aea31e2f7416adc408437d866f1d55c0b2ffc4699. 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/QZWFF2508772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4baa483102fa14cc1b412b92f0eeb8f0f88c7d1673bd9ac19bce19ede35796. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFF2508773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86058a0a3b7c6217e1db6987edaf25ccd366b74b7100fdce75a5cf3efb544034. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:10Z), 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/QZWFF2508771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130bab6c145c41bee719250777a948fcc534281abc5fc8f44262d812f537714. 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/QZWFF2506998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a9cf156100dfb059cb56690e0fba3d90501582a99ac774a23dca69966c1b69. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:31:05Z), 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/QZWFE2596752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb482be21ef99f41464c6ede1e25d3e254059a3d7bd014c2efce4bbfe7f29a1e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:22:55Z), 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/QZWFE2596751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7e66e11597b35c135918af1daa705af0a87daae0043aab53497210248871a. 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/QZWFE2596748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6797ece092b91473de874255d3d7bdcbeb7c5b2dd3aa2001bd40fec7259863c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFF2510985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017eb08404b72cf7df6eeb7f37f40711d4d90d5b48ebd155164bccee02a1313b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZWFE2596747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039e1f72323da5f4f5cf8546fd5f9b152ef0f9c22b90e3caa6ad2dc104b5b246. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:48:34Z), 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/QZWFE2596749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4df99a6b040a65d8410abe1561dee732e1d8d2fa02b3db0131794d833cd362b. 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/QZWFG2529175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85804dca6d297a504999d411b99be2cf2cc98b172e7e6db09186a024439d8291. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:59:26Z), 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/QZWFG2529171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512e590461b6d9c11dcc783525b0f868e995261b9873e5b7c342fe56c8b5cde5. 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/QZWFG2527586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0a10f953210a1e29462c478558ecf7691c254995ddd933ecda3c6e77500812. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:57Z), 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/QZWFG2531019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6002ecf0bb6ffab1774203b143c15aa840f595b7ac86c1c11f60f5af7eae75. 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/QZWFG2529198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2412e6dceb0d6fddc147cad401eaf06cf07dee40d27eeef50c7c90ee3fc1b9e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFG2529170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4abe7c54e2b057ef562f37f9f364601959675dd59985717fbb3a54fbb145c. 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/QZWFG2532641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8348aeaa22e4b6c446efb5c0218ba5985bec236df7763b62e63ebcc737b387f2. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:53:24Z), 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/QZWFG2529173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e76899882982690b56ac356531b0fd265d3599e466c8d9914202162817ccbf. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZWFG2529177.