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 0xf5767deb6c8e6625de917f7da48350e905741abe5bed9e54089d6de6365ff6b1. 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/56e99e81-cdb9-46f3-87b1-249ac7027ba7.json and https://artists.proofprofile.net/proofs/artist/56e99e81-cdb9-46f3-87b1-249ac7027ba7.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 0x9edc2db5de9515441a62fb1c30d652c3eaed6cc45cc6cde3b41325773cb26c61. 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/ESA012195988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681face336732f93c467fbd824de8a129184f6eef80a46d0203a666da628e42b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ESA012195992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9defb9a4127f7d487f151d6774b00eb19b435238ab252eb9582eb97a1dddb05. 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/ESA012195994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808e60e95c94c052aca9fb965f8979181a9cbae00b9aa628cfb1f19d0e76b228. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:29Z), 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/ESA012196000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48e77cbbe6a87780ab1945918ab68884d7e114e9e2d52575e07ef6ed0496224. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ESA012196001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa806d2d7f8c90167e2bea809c9559c04af94d0059e75df54bf256c5d21785. 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/QZN882357334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7f6945e9c0d9e137df92307c50aecce3922ea7498770bb52986442692e3357. 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/QZN882357340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf453a40f100724cd55ccd970f24d20369f904c299772fdc14b5c217f6f345131. 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/QZN882357350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b693eb8efc29916f125e8c6526c8cb2b2d9e678cdbc777b268ee047713e8688. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/QZNJY2341953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e38c5e724a53446caa39034c2fddcb2e013abb290c7071ec329d3b265650b. 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/QZNJY2319230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8746418bfefd72f8ec2de5d7e167817c862aa3fa3cd5d0b5789cd4ac418fd35c. 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/QZNJY2313519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb48a0778203d5d089f9aa65cbfcb18b41c06bf35ca3a81b79eeb28dd3ffce1. 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/QZNJY2313521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e0fe6d8dcf2f868aadbb4538bcefde70d4d0a7be0b527749964533f02538b0. 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/QZNJY2313525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d5efe5f7b9697e86ed744ba465d3e31119ae67a4700e6ee55b8bf9f83bb05. 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/QZNJY2313526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb34fbd33664b1c76f8835ee7143c9ab446b5e30f166df796c496e4b4f153e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:58:26Z), 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/QZNJY2313529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196212d408f5fa3af933456eb87752a2a2075facfdb241b5e1550605d7be193b. 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/QZNJY2313532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158f4b02c310a62a2e8c2b79de4e891e584f793ba1499cb921ea9617ed752d19. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNJY2341317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b0c833284534a34b08323629769ffe437c45bb6407ba1940ae4f4c6d407d4f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:57Z), 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/QZNJY2341319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ab953125ed97c424fee461a4f439680febc7c6553b359a1d72b6e9e540e3a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:18:32Z), 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/US7VG2418570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324b7fae7ed34c0a387a4e53e4f691c0f6d9256cae4d9e76c95d26f0944db548. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:01Z), 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/US7VG2418571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fac95986f6609e9e6baa37b3627e8d8aa39ab8f55d80599553a2bd991d335b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/US7VG2418572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727c7a0059c5bc212eb1c6f9859fca979832ca8fdee025833dcce6b014602c4. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/US7VG2458765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79612d235da0e4f15e6b84d9bf783ecb027b5b0b4197cb36ce0514773549a1fb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US7VG2458767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261669ddf10093afe3ee0bc06577d3fe9bd36a3f2a912660a11f43a08400be44. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US7VG2458768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68c45bc3403b3dc5e076139d68c4bce071f916751b012b86ea3d145bdac592a. 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/US7VG2458770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac914969d3798b6863061b5b2678a1bd7d13c3e21117a6c9c2ccaceb0a4aee8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:48Z), 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/QZNJZ2467190.