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 0x31459aee5251be8720ef5752cd8bb7f14dcc090049aa05c5f7a991b043e77230. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21f4cefd-dda7-476b-98ce-9955d3181340.json and https://artists.proofprofile.net/proofs/artist/21f4cefd-dda7-476b-98ce-9955d3181340.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 0x21fcde7f1c0c4e00e7a9516ecc0445944f586c38e245c19556ac50bfb017311f. 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/QZMHK2307544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c4ca1b3124a1dcb52f2d63d76f59a7e02cc4528040a4c011fe98552c85dc15. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:59Z), 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/QZMHL2391733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60309e4380f7e456b08846558b5cde826e23af396141aaca2b0c72bcf5ece486. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM42K2379183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af31ea2e57354bf16590df71253331700455ae5776f8a92294c4dd0ba8eb93d. 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/QZS642377647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96db679bc156f7fab8fd4febf242f69845b8ea4d37826d695d2dddcc658b0753. 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/QZS632336727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cdc8b644a3f979133a5582593ffa033ce6643f90af29da2617a88d94f3ac2d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMHM2336208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e347eaeafe5f8cd2db7e846d72011623a1c6a199f0e6c93d7c0b01dbcc62e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:02Z), 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/QZMHN2325363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da812e9f39040d3785c39e299662ebc3e22c3d4a6a21d85e5cc2c9596ac26a1. 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/QZMHN2318611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec124738a657a019169adcba8cc83e95606de48aef666834058db29f6e52a84. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMHM2361632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a01dc25b4165abb9274024875d4f1f77d40294086b9cf234f2635368efe6aa. 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/QM42K2389847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f9fce9524d8e026fbffdc65f7c4294d1bab9680420dfac67ea67b17f9e7510. 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/QZS642388267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde427af7c7f191144312c04af8df501cf9d7fa31a69719caa7bb33c06031e1fe. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZS632355298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f16ba9c8d59e9a7eaaabb19699d7e5862fcdff89b9ebe7baaf9c86dfb369e8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZMHK2341336.