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 0xb2645e5109427ac92d4b74c6652a0809899885ef27bae1d22f839c4ad7c1f83c. 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/5a427d58-a38a-412c-bf4f-75a57c1d4f29.json and https://artists.proofprofile.net/proofs/artist/5a427d58-a38a-412c-bf4f-75a57c1d4f29.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 0x287b6609a765ce9a956f30a7318a3b8177cc359c4651eaa6afae61c151ab050c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB52296022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd6d8f29de7cef9ac568c6b72d77e4be9151b2f9ce317f2455f259a6deb1e59. 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/QZTB92278967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2414ee1678a804ece7f12cb989d90267076c937b7ee8a09dc6d6c383097af4f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ62319025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2401ca491ec8e2b3aa5d75d7956103156317f9a8523c0cbc0a4c54e79c0a25d1. 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/QZHN82358158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8e0230d90b98d3502027aa4445a793bb31d9a499e179551551e363e708c976. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6Q2341625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fbe4b2ac6fae6c8734b2895740327fe805cf29cc917ce27e0b99b7c6401190. 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/QZTAZ2348167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd51280d5bc5a48ade7d06c68f1401e1daa5737c09137b7ddfc2c89a955464dd. 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/QZWFK2303723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128571ecbe2968f8b74584d23ff5b00edefd260c81b6eb5acd637f760dbe7c7f. 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/QZWFN2338940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5046a232dc43e6bd6c2c9369d38b3bf2881377fc4670ac462b9a85464e3cd1b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWFJ2315843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358ae2790bb010f6cc2d639d6d0ed3c38285f50b889aab999cf367eb59b0d50c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ32438765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc982314ebf456c82183f3025da847ce4bc8bf59a878cf3c4900a4120871e07. 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/QZFZ62453959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffe2e536a16325eb4cbf0c874fcf6aad936c2f29bdf341a07a36036e4e4aed5. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZFZ62453960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f2e673d8e695ba33956e355cbe19c6f613cb0f29530d083208c0bcfcf3bc69. 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/QZFZ62453963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc840de2b2f3e5365cab03e531e4df08ae5f42c2ba050c3ea7efbbab085f5207a. 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/QZWFP2427937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748beb1c0f1e5db39d54982d3b18e3d0d2c7224332872eec3804a1a536f3926f. 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/QZWFR2482202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e21982dd5c15c29285c6e5700aa07fd19ab092ecf01f47822d31d832f243364. 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/QZZ762493999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d1a16c0b879c61a9ce70d00c3c872de757b1d421238c5d2fba9d0d4aecb608. 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/QZZ772429609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5077234a7c7f00874990b19421ffd4d7db2c93046006a087911e80bcb526a82a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZZ7U2469046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e63478313f3b6e5cd09b7fc0cfc1c2a6b03e2481a340808ddc0c778ed7ebc4. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZFZ32516875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3f770e6d2a7bf3ba2cb6740f1be38efe88ecfecf8467eeb277fadb3ad8e8e2. 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/QZFZ32516876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf184fa47f961bf8ee9566a688224982279b739d872c68926635356b3563f49ba. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZES82586002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29898ef859a002381ff0faeaa0d52baa4bf1100c4f5b8e9a8ffa9641f6ceb074. 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/QZHN42588560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64faab8f25d2518038cb70844478a2f8a00776a870d56f5265e14d513ce0acf5. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZHN52562739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893c4736e7ad7d0eb3d6a8c548273598fb29f390886a3704b50612b29fb6ad42. 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/QZK6Q2502418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647d2bf7afb3c14fe4a963f42fcf5710fc39732486a0cc7cda348d9052b5db8a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZNWQ2511572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3275e1afa52d8910a95cba737cc43425d53ae2429d8ab4335e2881093a70dff. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAW2580828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85c2b5010629eed511381446f4ecdccb1e6bc716340bfe8c65cdcea4ad19520. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAW2575048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4bd09a574c3cfac531d95228ebc9d1d0634d1a3ee00f97e7eeba8a10249824. 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/QZTB72598667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe779071fc614cf7d1a2df40c87739d1d9a6833bc3d08dfd937ca449269618527. 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/QZTBF2571050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0b8349a81ff61e698ccb531596a155996fb75a3c1787c70b8aff0e7ad8905c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZZ7N2531039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c805a7e40b85025688d54be52ca5340ede739320aff277091e9537b1618ae4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QT3EZ2567779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6949d7e417bf3ae72466d8f3c633eec079de7635dabb6cfed34509e5aef2c6b. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QT3EZ2567782.