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 0x312a7e9aa1b5768144bd6e969c578fd23d61b5ded80d04ddbe1da153519a72e6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b121e15-6ac5-4283-b20f-af471ae702db.json and https://artists.proofprofile.net/proofs/artist/3b121e15-6ac5-4283-b20f-af471ae702db.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 0xb6ea65218f0e985f201b90173117e76594c5123cfb70a4d28dfb695a2f883abe. 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/QZMBZ2500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7450b800fe9e8888939b2bef637e1dd3fa0f454a6fc3d3b1c88500d990bcf04a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMBZ2500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3684feafe6f744c74487d65915da72d6866255b154dcd2b84fd4cdee9f44cf30. 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/QZMBZ2500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75673d75c18fb8276405f30d5e2d231f178549b3175a71f7290d9cd79db85eee. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZMBZ2500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc336f17a3783bdc97103e41dcf810486b9626d3304d5703e47022f3f96c4a39. 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/QZMBZ2500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8328069421a2cbe1da8dae0bae9500b71c8bcaeb2a27e4d8260629d9b68885d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZMBZ2500168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f1ce1eedd28d8c779e442c58b2e9d5c4327e8acf35fde4805e71f07eccf381. 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/QZMBZ2500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500c9c2aef68a93d55626b804741a51f2220f0d1e1ee2b4db652b56a70bbba77. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMBZ2500160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bb766b21c32178feba5260444cc731e4a87bc539435dc3db41572b09c0e501. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMBZ2500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ccb4615198be1a97bb16a56135e92c9562a514906179d039c4f9206af4f609. 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/QZMBZ2500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a529bea605f229568e044b82fde20c61c409cfef80a0cd9e0bc181dd28efac. 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/QZMBZ2500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1165af8d0feb4ae126fb8a80499404afca1664577de6688cd9cbc346dad25e4. 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/QZMBZ2500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc17a1aa8eb41c567ef3c9ca5959270312407b1ccacd58d015a4f75d1fe5cb1c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:49Z), 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/QZMBZ2500162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6acfb98e7962b1e3e7aba201186679bf0bd676e5756f70ae4a5ff94ea7f8a6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:32Z), 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/QZMBZ2500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda061623997144d1c908956b77f7fe3fd58bce96e826b67384db9e710059849f. 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/QZMBZ2500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900c5abfff80bf09e40e1047e0cb2439ec4306e504bf34f321c898fcbcf54147. 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/QZMBZ2500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4b5e43c486a8ba91762a13610a1b81aaab8c38c51cda54000ef543802f1d4c. 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/QZMBZ2500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3340d31b3b3d5ff5de2d81619700fe755fd59c254b49794f1896b0300b6d1. 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/QZMBZ2500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a54a177112882f2da40d4eb277c6b00a8b404549bd9e9c95713bdefcdfd19. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMBZ2500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911f219342d86af9dd9198aa27b651ecbd1952708232878c7bf37227ff219269. 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/QZMBZ2500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62292d56b7fd8e97c6f0a476825931516ab60e94e107d89dabe85fefb53b446. 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/QZMBZ2500297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c5f0e0c57d091801e7200aa7c9eae90e9c5c551aedcc579fbaa96d737a230. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMBZ2500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9c73a2cad038348489acc4f7534053b6ced573cf1fb013e04a26b5ca1b7e75. 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/QZMBZ2500291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfc985be48954a41403c0ac76ea0070f4edbf9c6328efdb23362df7666f46da. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMBZ2500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a0607257c75c2c39ff0f36de2c823c71b20758c782bb0c75627c9ff9d48093. 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/QZMBZ2500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954092183e2d96808d24e2163f958a290fcdca95608fd3315cfc8259920ec60. 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/QZMBZ2500276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e8c19596f0ea9b79aecd02298613c1e1dbd628c8f522fe154e11f66818346. 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/QZMBZ2500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106ec7ae908d9cead9984ec754a259d8e4b122d376679b244816f6bc10f39c2. 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/QZMBZ2500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0f2e22f499fbe5df26037ab33308692d7e825cc75355eec8a0986a1c39115f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMBZ2500293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed1bebe0a491c32f92161c2bb6d16ad4fbc2a4628c3fbab4e0d2e884f6bb108. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMBZ2500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fabf9915580015d5711b492f1aa960bfe1e9a0274a6ba4ec6d55b2951aa468f. 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/QZMBZ2500292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf026a647e8404ac56408c5714bb6b0eaed1a7e5d31cbe8c4b01659415b09073b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMBZ2500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96d20ad231af3bf250192f76ce31ceafaefc326a6f48088fce87799a95d1ef7. 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/QZMBZ2500273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f00b22678f3dda604868be67beb69b861243b4c5e84613693e90155fc14370. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMBZ2500294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9abadc72e9e2b168a13ce0ac0426b818b07169b7efbd0c8ee259d0087b9fc1c. 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/QZMBZ2500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfa479f6e0d8d75c52adc616b576f71a2e20cab9ca52344b32d02887c510797. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMBZ2500295.