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 0x2c145c306a86ecd0f29f3a3ad9c7aeb6c2a4fcbc6954af466c272d2551cad1a1. 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/9be97b55-70a9-4fef-a572-63e6e915a6f6.json and https://artists.proofprofile.net/proofs/artist/9be97b55-70a9-4fef-a572-63e6e915a6f6.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 0xdf2f996d98d346f1467d7ee4dd445d0c151932671f451dc663a61902082e3e05. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAS2278961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd2d1c0477c982c42c06aa1e63fe5bb598ef26e7e300bef8620cd1ea9b0f0ee. 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/USA2P2304392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d2a40e89c210fe8a073a64450662f25a3d517f56219d152b2d66e0d4b074fc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P2312906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c9dfb3e2cae0d2b7c3233398f34eefeab62afa097d7b3d9dd468f4d3ac7308. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2P2313690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9879d25368d5f547ea694306d7274bcd048609d25e231d769db785041700b3ae. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USA2P2345765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a997f1bd1268a21660a8e1f9ee0d326c8804e98946fb9acf386c03ec8db69fb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USA2P2347712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96334549c4ebfcb2445a116836f5713b0807c440df8c634938aa05320e0dc3f8. 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/USA2P2352179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89df3ef911a93425bee3a590eb77a5f1bc1f7aab27722ed8e5b9a2900acc435. 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/USA2P2357931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc327a3fca90fb0583416d15ddf9fbee63efc13ce6f50f8e2b2d1b223725d94. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USA2P2363656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee6613c957a35879852f8bb7446a1d3664851a42489020dbc58665645cbece4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2463319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78e7191003146bd546b9b9aa03c5b69f7d899a7941127a45339c4ed02fa1509. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USA2P2466052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04754072db95998931134ed5686db617c3a45f7c3a2634865e975a13f66f9e6b. 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/USA2P2472753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd588cb096562e405b084c28d64675a3fd24a667cd627448f4c1fa93ab1630e31. 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/USA2P2471286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb998fcd417390df9581ef337a2519db14afd411fdf701bc1deb049cd608961f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2467160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2c4a4d7d79fd14a8b607bbada9301499670c0fc30f3290c58eea763989d37a. 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/USA2P2353053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382e124bcb56db5411ec59f9d31c7b64533ed02d1cdb05776e210605dd665262. 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/USA2P2350816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2343a25620fc2399c0b9c401b97bff390de413f68abc57c591d15b53158bc9. 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/NO2DY2300526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b78a5016b8b5d10d26fecd380963f24272a1a04bac1554c2d466cbb55990ff. 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/USA2P2320718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700d1f74d277c9de1e84cc0a02a54ecdd80b6a846694810b718043902159aa68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2351882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd158e848272af077be420dca6b1438af18cf00d62db625f419e243604db3ebd3. 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/USA2P2473744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda390b766651b1b2b663ed577246da79ce43cd34746741a6b07ab5e5f9d389. 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/NOX8G2400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda390b766651b1b2b663ed577246da79ce43cd34746741a6b07ab5e5f9d389. 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/NOX8G2400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27993afa065654a2d9a39dbf53568ec52270bb9a1c8ee416bf42c873d4294c3e. 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/USA2P2353203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe538ca59c8478603f98392cfe28a6b45d2bfda4a6124c1b702a53ae00f410ad5. 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/USA2P2351344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62903deb8e911777c3f52edf58d8cc405c2e918745f8f991a38a1745289d6450. 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/USA2P2471646.