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 0x1fa598f3f16ca3ba947fd4f45851a5e723157733bc810c8a1a8dfea6b10619ed. 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/f87836cb-b222-41a1-becf-50454ba374bd.json and https://artists.proofprofile.net/proofs/artist/f87836cb-b222-41a1-becf-50454ba374bd.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 0xb4295507330944a6834a55c152539e855000b59e862269af298c0638b8ce013c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US7VG1538699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c9a7c3716454a833d2ab874ce77a57253f9206e55e80b5ed6ae6b20d5c3962. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US7VG1538702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8629d3c56c710c93dd304c153db4e1a6642975f6f20ef928b814e201f095da13. 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/US7VG1538703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc13704c2ffd3ab1ccf6df70b0bcf1f1a1a38887c817dfe62dea2e3a92a34ca3. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/US7VG1538704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e8fc2f11e5ab052c5fc116c3cf4c53df8fdef22067aa889c37b32cb2c1bdb5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US7VG1538705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb281dcc2487ee86963bf5b0ae454e75da6ff2596aeef14747a143a59333ff352. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US7VG1538707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef7bd0a298c96bf3bff4e9ab47ac0b8e8e9b1a7f9cd5321ffe347ec21dae1d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US7VG1544201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bd679de3b9902c78224ef9dbfe7cc740f79c393897772703d604ba3d21a112. 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/US7VG1710287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7c3887e809fe0c9c0a38776d06d1bb7fbf245171f8a8780834800a051d24c1. 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/US7VG1729999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2740a67f860f4ca6872514195723ec897a3e64de6d404b5c8bf2f7c4148046b6. 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/US7VG1639037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1acc9d7fc249949e111fd840ab8dfe39d98615c818d0fb9e78d3b1ed60d578. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ5AB1601573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157b3743925dd555c2071ee8e415f48ff7e17014dd9a9f38ee3fde81fc501d44. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZ5AB2025287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68056ffe97d144ea4db4f6bd07f341454cac86857ce6467e3bef90eef9386e83. 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/QZ5AB2025288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea70c6122d80f5c8906fbc924f8d3c9066c4b81f4182125c0e34232d142a178. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJW2088454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1729e51a7b7f8aff98a7a4b998b237d7ff2ab2b1a20937505d40744f98a490f7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNJW2088455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b01b9e6d0cab4ea47534933cce53339711971b619ed2a127b02dbf7b6ca974. 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/QZNJW2088456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105626e3a14e0f12bebbdfb7697987b7301be59c6ee431c5cba33066e820b63c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2230541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fd12b8b685d63985c2353b36fea3678d5e6028027aa741bf7ae02f444bbf62. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ42295181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6438bab7c17707b3dcf857f1672ee03a83503a8482efcc28cf0fb13ce82223e9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ42295182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396fdb67d3990fc69316ed66c51fff01d29c216fe36ad22300e80370e9561275. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZGLS2156075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff666499bfb8309eaccbac6d0d99e9c8d139554bfc92eadc699256406958192. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ42295183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c39b9c3a9062e17041bd5b3e66679e02a0af05bd3ae40ebd154e8c4f09b8ed2. 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/QZHZ42295184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1252e5a298280d6c4c6992c4554ad472763aa71650d5aa11460ad1da136148b. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHZ42295185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd156f2e2822e25f4db611999772362a1922f4e00b3f6506d5f3bfcf001d66cb2. 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/USDXS2204076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba8fe264a7ca003a9b883bf5203e4ad72c14f0df7e0b5260647c43ccddceacd. 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/US7VG2322250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f9c3ff6a80c8d2cc1c6958996ca0189dfaa4dc417137d28d9e431e1ee8de7b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZS7J2355030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16abd6f37cb0e0e3b1d795e51f5823d4407605742d1294ba16bffa901d30e22. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZQAY2326700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970fc81bbe0654195bc62fd61447ea00c43e0aa8edcb6f8b3f37e76f3e063ecc. 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/QZSYP2376293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7201992afd339997cb8331119a1a5823fef7fb9d8d04667b03098db6102a31f7. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZS7J2390300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dd42ef5530a82cf415699bc53d0e22dd6111e20a4025d44e21bef139f6ee40. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZS7J2333577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b5fddf974f419cd88b256444909b5b2e98a725380367ed8b6baa0c8ebe6ddc. 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/GBKQU1880174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c649fb7ab7fec8498331c8af6686f2f01d92d090250aff7f9b9de8b4ee51581. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBLFP1792307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495c941eb0c9214e13f788f1dde161350dc62d74b9f83644335d1b8be863904d. 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/QZTVM2385272.