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 0x1f3b20787aa65a1a9863afba654d1266be8017ea77dc364f7e455e1694a77aa9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/333a4a23-a2a4-4b5c-8ee5-5de666c2c5dc.json and https://artists.proofprofile.net/proofs/artist/333a4a23-a2a4-4b5c-8ee5-5de666c2c5dc.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 0x0b01af8efe89038e799308f4ae27fe3246d82ecf7e6262c11138d61808f7ddf8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZQAY2220312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709005aea386f02089be6ac54bf85c11cecaff11b5be286df1b6c3932a209904. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTLA2367076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9970374306dfb2b547ad49b768b787f66728facb575c9a5034a22d10e7059061. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2311644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ab19e215a0c2a6c9e8888f07d3dd5f1109f6b972aef1bef7e0de5c3f0210d1. 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/QT2VB2404641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c73783f7c378d7147b9d70d2b8bdfba27e4ebedd7a3f402e38d8da7fdb3fd. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:36Z), 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/QT2VB2404644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c85dac9a71c382bc44ef721990e8a694f4af1c5f66d4cbdafee44069af8e5e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAIW2421048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e6f95aa70ae673da209283e5c21b4fe103d4734f61c2b5a7e1e1c3ac113661. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJD2416147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f2a49f8ddb2a9cff2a6672345acfe728b0511cfb414c6e6a6e0dea2b14ac0e. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZPEW2510074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cb4a8df669834337b54c46ca8dee63ef420483cdbfd36890af28585e592bf2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZPEW2518968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1c2d40d858852053591773ab5b26d47232d96729bb4bd8a28f2ed7ccef5ed7. 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/QZPEW2530425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9948b1eea46d3d79173ef5f76deeff7e04dfb94375ac11b051c1bb629d2bc60. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZPEW2530426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfe6e64112bb75a4a8f4b1d0ddd787a3a0281e5dd4923ca9797f3d938764f14. 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/QZPEW2530427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7909f6c89ff092b2310bfb1325d6e20fd6d99f843f9e1709850dd86d131c38. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPEW2572120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794f3b36593e47498569dbd2e8ded095f9ac41bba179de9e677e3f9776390192. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPEW2572121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154961294963fa5d24fbc4c7ad6a8b92e1842ab0b185f4cbab62a20d4ac56b13. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZPEW2572122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af2f6387f9c6ea359e7a666f1a478969f6f12afee69490a06fdf7ce43548c6e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZPEW2572123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25620c498d011a727ccac65381ae0bff78b9e5a9ea32937164ca559bd7a4da36. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPEW2572124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7791a592aaf0389d92cad95f06c5b4c3ffea5b0b025508e75a5b2f5ef48a9c3. 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/QZPEW2572125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3278cd275f40fcb317eadd1a79b00e103b7bfd369c7f8899fb27c759c29b8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:48:23Z), 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/TCAJM2584995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb3990226282348f76ab06929d0bbf7d512ff73b02981129f5a4eb87e9e8634. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:13Z), 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/TCAJQ2553606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6465b56e321f11f466ad2317ebbbc99e6909138dc9ac3ddf6bab738f36b232. 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/QZXLZ2541232.