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 0x7a1d2b9e1bd314c891ce1a070d6ff16b2d38da9324e67194ee5044d6b9b13017. 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/e8cde49a-07d1-4325-94e7-0655358d83bc.json and https://artists.proofprofile.net/proofs/artist/e8cde49a-07d1-4325-94e7-0655358d83bc.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 0x4f0530ca47ae57db9d6f788978dfbf688210749e44572306119a2ae89d9b0bb7. 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/QZMEM2130121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a55b5be117adfae4c09218dce64c71f61daf52c8f85b8c767554f1036e88e4. 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/QZMEM2130122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e820316b82231d675ed4f10e3e31540cf6a33fe17623cee741b1be79f5ab94. 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/QZMEM2130123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a82ea0ba300569997f92fb6189b701a1b5a6311cd6b2a6fa308beb8d16dee1. 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/QZMEM2130124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be7b442431d361ab26ff0193eb2ad2eb39b3d4c2ae2a73b28d43a833bfb275e. 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/QZMEM2130125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659412e6bc29a64a4e8fc6af4d903f543a46963ddaf398832b04513e1dc102ee. 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/QZMEM2130126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc440ff71f61745323b8b2724c45aa78ad02e495f18553831512cfc6e00a15. 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/QZMEM2130127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef0e39e42dee7effac3332e8c8ada673369a9a3f4ce89c0add3c46b8a6198d. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:03:25Z), 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/QZMEM2130128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7898450f0f7f66cf751100f2fa9383517ca09e2b3cb4f8b683cb6d1866ce9cd. 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/QZMEM2130129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283c454f312c33bfe4afe180a06bdc36ecf20559ccb6812660028fd279f87fb. 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/QZMEM2130130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3fdfa14e438cee2d8b23e8530ac4fd394b43cb551b04bc69b6f3206dabc620. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:47Z), 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/QZMEM2130131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63771ca0a21215d5b8e60402690c5e683d9bfbeaeab9be2f099561ce1939c80. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:23Z), 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/QZMEM2130133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3619e48f325c8f07b587a710a4457c3f2b4ef3ba4bb8642440d0c90bcb4e17. 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/QZMEM2130134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c784735137081381287359972ab6be2cf275a405add1fcf88274881d3885ff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEM2130136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4540ef7bf0f858e7586088afed20486dd2eb9e56064a5dd884b7c418217056. 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/QZMEM2130137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f65cf2daa422d50ba14880438da910b70626899612b7faa3e3bfaf15c2dee. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZMEM2130141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb2f83ae426353a3b6e607d71519487d05938d3c3c10f5331316d6b18248fb9. 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/QZMEM2130146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ed9697a85e2b19019b84859afa4922aa7ba1653b1836d598d8b3bc6600c95d. 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/QZMEM2130148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ec6bb37b1de4e67986641a68f898c2c5ecf78c45f45ff914555acfa1b91261. 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/QZMEM2130156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7e18d539b7c2559e955deaf61d6300caf429506f20eb766501a3776771083. 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/QZMEM2130162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17af80361c0c253617a2d1dd01663a1eb509b2c697419f903a87d2980d6b69e. 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/QZMEM2130165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be705d5ad8501642c75906418d20af355a3ddbc0a03d7a6cb3604e869aa218f. 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/QZMEM2130166.