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 0x5886476f51a3c7eea386327a8a090fa68949f36fedb44f03407a2c12bb73145c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b544716-a28a-4cfb-93c7-d3f7a104e56b.json and https://artists.proofprofile.net/proofs/artist/7b544716-a28a-4cfb-93c7-d3f7a104e56b.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 0xa438b57e7cacb92f6424d47474b107c8aa01f5f62af2c1a7ccb2378ad12697dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWT2420419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef1d39eaceb9a11a23073a7f05b02e9a94c0e7088497e806c599817ee53fd5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUMEV2438271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b1907b162a2f826e7c89fdd7a6e3aca6f9a30bf5daeeb8ba70333319b0917d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFE2443099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602694632bc8becf2886859586cf1ca10c6876a40a7da23c3fe674c008d418c0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFN2457995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b5d955d2c47fc38d0d1e2c793db75f5e2b1136d5069a9387d2b7d4281b2934. 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/AUMEV2402068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a6216589dbb8bc55ace331c34486e5084bffd0d3ff309d0b2b2a855106863f. 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/QZTBC2362461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46779fdba42804642779f1d4d4b8558efcf9056bee7cf6be0ed3f15a79754e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBF2322062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b865bd27d71466e1d0335669e0af9b1a5e1aa910281913121d46f54cee9c45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB72353332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2054b97a3604bd8356964e350daba4ba202f6033260338bc505e77d276ea3df1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAW2367064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f8e021aadcc2a0aa45aa08eb854c79c109f2464a3190a1ae3fac3c164a224. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6K2390328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb413268c8049211cd405c6b0e543b8d685aacedcccd233b22928165e76cfa3a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6M2353697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6d07a96a341ddf53020cf49e1c909d2c049f83081367baeecd8350c1de4b32. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES92352393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9dcbc7fa23ea125e4c880ab54184a6c0e35422271c607f660afadedfd8d82c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES52369740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08012ef28fe7a57537884eeb601981c77890e3c879a8ebfe6bddbcd28870ae27. 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/QZDA72351476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afdcabd6ccc0029fa6ac666572a1803cabce4787bfc0fe26cb89fa193f8ee1d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA52319782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504a9dc450d9960b012b53e803e80b7c3515837c1e728036f4cac89e6968c48c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ32363911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30337db414f004ecbd5997e45b395e24297696fba33d606cbd9c38d19356f8a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYX2324686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe335148fe74cac1025d27244641a2c9edbab23333a97bb826066503dfc31d13d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB62273610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55575b22eea807ab17cb237a8550163a83e00142b8a3724da99c80b89cfc0a2f. 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/QZTAU2288488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4d694f73c93f629e02c6ed1e004819a7f8b2432a34d52ae1f4ca145f13514. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN72574729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb2fdc3374a5575449a633ff4e28769545736f4ba57156fbbecd3d8ea3f3978. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62299584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888935e43f3bc845aaa68884e598c20ea4b372935559c0e8cf5b5c0deb6cbc1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6P2273103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51575cbb409f65a509b76978ce5e24603d0ac95d54e67c1408eb50855e6cbd7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMER2170273.