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 0xfb59db0bff46b3a147efac9ac9c201d3a427c14106993eb8a71088a568be5691. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2065fbbb-c5f8-417b-8740-58d2606d7f48.json and https://artists.proofprofile.net/proofs/artist/2065fbbb-c5f8-417b-8740-58d2606d7f48.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 0x760700355f62fc78837115f8df52530488aa90563a4761df906d2becaef2b148. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/SE6I32028571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e885ba375f3ad7c98fdab44b620b1088f05e6189a8b49056c7c55004575cf. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/SE6A92006243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb309dc56393049f029a5dc5ed50da53962b7caae64d776cc21376d92c01baa05. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEV2195042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0cd7c1b630cf348df3412b2d42ffa2874bd270c31a29a7ec78a8a551defb75. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEV2195044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae48be89933e58a7aa362e391f787a0586a19fae884abeb569013e8aad2ca677. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZNMX2204448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a3cfc3f58f09921d96f870d080d82373a8cf61abdb02fca7928a50770d4db. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNMZ2286459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d2262061439bbf9a46bc5eb20aec1738975ae162b8eb6532b79f85676564fd. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNB82489773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d5676d10064fac40b44d194798687fa29d7a90cf2883476d21a0a767c0d7c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:45Z), 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/QZNB82489777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc469ddc7ffa58d9cb276ddcfb32398d2bac5692908abb6b0a6dd930ac2f89d9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNB82489779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f949218b319808fb2d26146e96a77e1742f038e7048fffd780dbeeaa77027. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:28Z), 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/QZNMY2487086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4db07417fc04ec6df1573d5e4522d1197a9f11df020a9b53e34cd8f5d283596. 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/QZMEV2507655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3752c6830542edc80ddccd4400b837a55ba556adbc220395e40141181784a8b8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNB82530459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6afc6ddb4b84bbd9edec20ef302aa828db48bac59b4d25d34e630a37b98af1f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:49Z), 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/QZNB82530460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbd31c84e8d3e938ae81612e85fad12488792cd03779a37e2a978dcce866eb9. 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/QZNB82530461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e77bf73a33674a7b77dff9788843d085af0c908dff6913e057e2b25da506c7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNB82530463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491010a279aa0debf9cc51e40529695eace26bd4ec7a131d185bccca000968b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNB82530465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce4d5aa4544bb32efc0bd435046db7bc291d47cea9779eed6411731622ab349. 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/QZNB82530466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd5b49e105f10ba80f6867c4ae1374e0d1c6f15968439376970bfd06364ba5a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNB82530467.