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 0x4142afe382070794eb1b3044d8a1ccb9cd6a417af7dc775aa34ea3ef544bdd98. 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/ad1c262b-ff4e-48ab-8962-32b314c35c6c.json and https://artists.proofprofile.net/proofs/artist/ad1c262b-ff4e-48ab-8962-32b314c35c6c.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 0x469fa0129c14824ea85df54342a9cfb3b532d27029c80e03e13adcae694b6f10. 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/SEVIK0400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc96587f1fc766e3b9ed1cc1141da45feec2abfc5faddf73d4e6e1069be4ca6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SEVIK0400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ba91178824a3eb5ea3fbdc5d8fc4dfa29b0356369894f1f5b58112c431d086. 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/SEYEQ0800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb44c3087c9245110f1ece23ea19f2171d125faba7fa66edaf1c028cacefd3ca. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/SEWBD1004802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecb4fb338a6cda686acaeb2478e164e52153d15d271507ac3f75200500ee0d3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEWBD1004803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d8df00b9662a270c8fb95f56185e82db5bd97a5018304613d8212acbfeec8a. 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/SEWBD1004804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a82bfc5d057bab655fe61be7d9c10af433edc0311529a116633ea319a05984. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:09:32Z), 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/SEWBD1204807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8961191baa7fc8136e6e53f4a1d6c7591e8dc3a680af7771982b2202d6663ef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:07:38Z), 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/SEWBD1204811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342c3a09d41a38be0024cff432b5015919352b1409ba28d697a90e2cbd345d5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:39:26Z), 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/SEWBD1304802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a07150cf8785d908dcbe9a13fd253e057b5cdd7519edfa31f88ee3708fa1580. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:43:46Z), 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/SEWBD1604803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d11d92268b47e107637ffaa53fd06852836556b14b413cba768193d0943dca3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:57:54Z), 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/SEWBD1604806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1e52d2a89b3653dfb53b86d837e09c4e2c839c28aa5156ec434104ea67c66d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5TT1802102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6610f481e1a305668763e08c4d0584ddb3f2a85e0c7aa1771eb4a62d8290ca. 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/SE5TT1802103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4bac602bdab7851bde4db9c835019c379823fe8496b202fd686fc215c25575. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE5TT1802104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe615c7a773e11767d23b925fb6addb4dd9b1f37392ce0ac0d8baa1c543961f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5TT1802108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6071a86f8522aad2bf440ff66e31e5e486fb39cab9705f10ca6931967e6f0b. 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/SE5TT1802109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf82ca1b1c0a6d2515c0a46737df1c40d067281a16e87ad7a351b25be949931. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:27:08Z), 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/SEWDJ2200301.