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 0x9dafed521fdcfc11e6da94579b7156d5faa0880a52c2e070b610135d1458429d. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a271aec-eb28-4bab-a54f-d1fe99533fc5.json and https://artists.proofprofile.net/proofs/artist/1a271aec-eb28-4bab-a54f-d1fe99533fc5.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 0x3171b699472d4219ceee32df702fb6e8cbeaf939269e405315ba2f67ad9e8a74. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:10Z), 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/SE5BU2280170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec72953738816c9fbb61d3fffcbd05b47c582143eef978122bb2c6afef55048. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZDQH2255611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006ffbbd3c711dea65a287293b108c3c6fbbbfc6bc9d47a13f028704ff33072f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDQH2257208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecb9cc9e5f628527a0e7b8e1aa1e3c86cdab1a3abe2879618c01347020c6f07. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USWL12401182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed3d6dd1d316b594a008cf732e8f7cf5eb12aa1d181a63639f78b55198fb40a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USWL12401357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf376aec4808a2864f1c46514b11fe7f1a4ac5f4cb175bbaf4405b23be45770ce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDQH2441020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9ace9f6ab49915069b5107083e8b9f3e6551bd567c11f6d25b6eb5735e503. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDQH2441024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe04f0c6b563292ad1f44e2df739c382445fb00b2638bc34bf0b485e4208078. 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/QZDQH2503138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa5d6ed4ce3cfbb314af2a7772a55cace8daed1e75c5c5c00219857020d5faa. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:22Z), 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/QT4C62500454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a968259323dbeaae91106a7d5f8e23d8153307740cc4231efc996f33ca8dc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:59Z), 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/US38Y2552326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dc853a064fc23c2dfb2f125c310e8823b362e2824910e32695a0faf19fdf58. 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/US38Y2552320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef122b43e3223ae8506ff6857a328a857c02225dc321190c4c68fa515c7ffe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US38Y2552322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f2803c48345d56e01ba6b5a5394392a5978b3e9794c2e97f46bdedce172b67. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US38Y2552323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b4de7dd97ad72dee63038d624796f8176e96524274851c7502fbbad2c2df63. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US38Y2552324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cccd0d5b131d2acfdf67cab2c42851e32cda2ac0e9a2851d8ced753e93fed27. 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/US38Y2552325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aba963d80b684eb704fac9762bfcb6bd53f811b10aab0616dac749cad7252df. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/US38Y2573448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8598d3029132172cdfadf72d8a079fdd241dc2743225a6ccf9a78efe9928f62b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/US38Y2573501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8843bf7d54a25a5c6ce80ed15b9bc5f954a6c27e5201dc6201f32752c1d2c8bb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US39N2524496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a4b81b4daf293d9b25d44403471a03a57c450198d63eb29b3c1bd47f8cf09d. 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/QZNFJ2119634.