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 0x40036dcc8e8f072f0cdf1cdd9105fc7b20b21a4843c69c90e085f8c28072be26. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44e59404-c534-4f9b-a5ff-6cd28573c51e.json and https://artists.proofprofile.net/proofs/artist/44e59404-c534-4f9b-a5ff-6cd28573c51e.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 0xf067f8e3d4420a1f9b2c63a9c07b4107eeea18b3ce583e193d25a14c4b29f549. 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/QZNWZ2457899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7e641e5e93604469f5107ca4d7d601f1afd10bdbf1d3b99b76efeeb74d4bc. 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/QZZ7K2494286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488369c3b67f5fcd1f83938d92e4abf6e074801bfca496ad64305a863995c49. 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/QZK6M2557009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd7f30b5983444d77ae2924ac4440d2fe76277e5e0926c263de664b4f9c55f. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWR2546766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aaff6a0626884ff80a31360f2196da20995ff31097b9f54651f7e4bc4575fa. 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/QZTAU2585352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a890284a9a873f68174bf5c4ff8ff90697333f52760898604610287b43c240c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTAY2571002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fd4cb051bf91da72f1110d660505643f2c500eac39bda4912fbd73f03a807e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTAZ2566695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ace0518c6da0d50ada250dc90569d2e126c42dc134876e16942f7680368ca88. 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/QZTBC2539940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeba8478035caa5b212ee0511e5df6abf177ba0b8f5d9f7403a84dfb2465d805. 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/QZTBC2542179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244d801ba0dc338dadb4025da6194fba598eacd3f07dd0e70237443079eebfa. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:15Z), 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/QZTBC2542190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2960964ada7b350aa890bcb052f655c9b37b9e2d097d27179b6b89137f57dd0. 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/QZTBD2540756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b760fc7cdb29e5a4ec80d777c58579b0e750fb6a3fe36efee2be6df90e71f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBE2539136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc0bed77308025faf2bd443749d3b76b8a96f6fc39d5e793a2cf9ecc056b164. 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/QZTBF2569225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef113d00afcba391798f5d634d64ce7c3eaaa821b78b7b312bd7a9c65755f458. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:15Z), 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/QZTBE2573545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725fee886b2c6333db27614d62468a8f8104ae7c867ae723b1d1cd58553c26b9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:01Z), 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/QZWFG2593189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79cfa1238526268523adc483b0cc1963ce059dd156778fe21cfb724b4913d0a. 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/QZWFN2516364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ea6727c6802fe2d8eec311574cc8fbc4ca246fb867d45017804147f5f1e794. 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/QZZ7N2519373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054c77b10aa9d652c0922d7595446bceac9373df678e01690f104c3d652e5e69. 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/QZZ7P2592721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf6e083745ea1ff57e062a3d08e7a15043db7defd7740ec546b8664f2633385. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3F82596467.