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 0x861e5416e3537cfec80c406768147ec9dd0f9f801a6d7b4933e5793789a22ebe. 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/406aa5a8-54a7-422b-bb6b-0dea234ea713.json and https://artists.proofprofile.net/proofs/artist/406aa5a8-54a7-422b-bb6b-0dea234ea713.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 0xa0f13fa14fca535e7f55a10ea812d935bb93422131ed58b6f4b564d0f24880d8. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZGLS1926810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad24b8aef0645dbc9723ec93e9b45e08c11d3a54a127cc0dc977598d319a47. 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/QZGLS1926813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfc1db5864b2d1b491fc9f1418e0f3ae1bbce75be152b17a13222d35ea5b39a. 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/QZGLS1926814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97855a133e1b21f5b4af8ef9e09893574ffb712cc7ef0a2ced9363e0a2122a9f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZGLS1926815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a81476b590d93176a0badbd1f2c1c6c98f5f274a9770beec1cb09ed2819c5. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZNJV2060766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3aaf4933eb1debcc615fb1ec4775d919d55b29ecc2c96ada33369c9bf4eaa2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNJV2060768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc650c3e137ada6d5a2df2ddbfb5f9bc3654405bbdb06306376b0d5b5e1d0599b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNJV2060770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7a3c93f132913c98293d65356d6156e2a1a37c716bcc6d6d846820853c05a9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNJV2060772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7fd55f0caf1ee35a183892da9c801769d7ca65b5942db4d1d96a4bf0985534. 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/QZGLS2306706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf586a990b0d6a05e316c601d09785a061c25c9646a7d672a6da91cfda2f869. 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/QZGLS2306707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaa227b236e4ebabbc3520115558f35024da95344aa8384d5ca413cb8e943ba. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZGLS2306708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0fb5f1ba17b6d517b019b1d9adcef4fa4f4622e921709f40fcb21cb5edb495. 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/QZGLS2306709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514bc7f54177c7d74b35bf4e52a3d34be94e4aa6ac7cad9af569faf8a8a96ab3. 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/QZGLS2306710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9202617e72ae352b012879203d863fe9a694fba2b83885c8791dea69ff650826. 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/QZGLS2306711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e04e3ab68763b197694fc371e59125fd409cadb622a1e1670a9ec531a3f0845. 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/QZGLS2306713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1e0fac817c04df412d58ae3d7a20c01fb635dbb2bdd7a754e94c74a4e19826. 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/QZGLS2306714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033b991249ecbdd9044a4782b770ef0201fa3a470ef97b3d44cd9765c62b30a. 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/QZGLS2306712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0dff7b21bdc2f66f127b5572185541dab69d48076c78cf86c34e9ae1fd947f. 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/QZGLS2306715.