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 0x3f913cb2b608046bc38c8f29b9bd01308826d6c4372844224dad81945ae4e2c2. 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/70873782-107e-41b8-8d50-64b3914d6f8b.json and https://artists.proofprofile.net/proofs/artist/70873782-107e-41b8-8d50-64b3914d6f8b.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 0xe67757d56865ea4c77d15f198aa7ada9e3154a925aabf06eb5ac7479d8c29c3f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDA82346897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc3d900efc5b500b49c51045fc6b4991a764e317a6854f1d10699ad0fa147f5. 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/QZFYY2385330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7126a6e9f8ace61ea1863e284912fbe931cd2f0604099662efae7ef8c99d6c6a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZDA82346898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd037053d77c8106fcc1911083a644e57146fd80bcdfc3ce7706b6605d1865af5. 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/QZDA82346899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd92e3c85fac8748b571b183ee4ec2e301d77de18569743f6b1f5fc9f45c1e4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZDA82346900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe601b78fd834bcaab80772b8817b83f5c9c9a630f44eaaaae14aa1baf11aa0f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZDA82346901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b9eff3dcada2e70cd88b8f36b3c2f7de84206a93e96ca2416c0f02f3b17a9. 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/QZFZ72357931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18492fe7c76e4dcaa1280367ee31793723126315eda551d5fe7915404594034. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZDA82346902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e492312c0c071d0b3b7bbe7e305653c3ec7c0cbab93a0d35900ef1240326c47. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZDA82346903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fc35bb1bf9615c3390392d3fc02c9be120b7ac8a486c98d734e7d8f8dc0172. 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/QZDA82346904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b2e4ed2dfe7252e50d6944f8b2997ca6b20ad55603774a307cdb955d97f469. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZDA82346905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b9eff3dcada2e70cd88b8f36b3c2f7de84206a93e96ca2416c0f02f3b17a9. 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/QZFZ72357931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc3d900efc5b500b49c51045fc6b4991a764e317a6854f1d10699ad0fa147f5. 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/QZFYY2385330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8afc3bf4d08e6ce106c7188151e001111f5364acf1b3e24cf1e8d76bba6364e. 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/QZMEM2261290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e1f53f7b10dbaa03c0ce9c0812325a4a3f585699536d63427776163e38ebe9. 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/QZFZ72243637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ebe50fb4dac503c35c327dde640b70bcf3e9107cb8976ef007b914cf634c8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN42162766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf98311f272958303969a058e9df5996abdc1f8314a7bb576aa98c5c448d10f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2010386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52abf331e59bff34975ceff9629e8e62f592042a083c1ef036f19ac537f4e57e. 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/QZES82041372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab0bc7c56adddd9e2defeed9c841496c2511d608765f4dc18a3cc7adf13b1c0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZHN42093799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35e77adfc666e4dd177e0b91dd5cee0894377b2b154509ffbc0a8f65e123aa4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN42093800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3476f44ba33e4f5956d72aa738d959d03c4a70e22eaa6cfcf4f8eb3bc2e1ad6. 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/QZHN42093802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52abf331e59bff34975ceff9629e8e62f592042a083c1ef036f19ac537f4e57e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZES82041372.