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 0x54a86cbb8a36c575470ef111d523fdda1aaa7fd74dd2a7c572cc785ba2ff680e. 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/8c766caf-a663-4c11-9afc-16f6f26bce82.json and https://artists.proofprofile.net/proofs/artist/8c766caf-a663-4c11-9afc-16f6f26bce82.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 0xefcabd7a44952d95597949e7fc2d1f223d9683a7e1a8b29724c267b27993c009. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QML4X1203001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbed91bd0ed46c6afe7069e37f1daa554f22cf4f9283dfac1074f843550dd39. 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/QML4X1203002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51699860a49a8577b1eaa87e0af2167b6417bf6e184ff37fcfd1983396e6fbe3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QML4X1203003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd9640882bf6d351f719667a17f97db86ab0d7a4af8320f47acd10263eec675. 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/QML4X1203004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5813756788f1e173da34a0f4ca2ece8be5d0b2c308369d4a0ee37a916f5e1d5e. 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/QML4X1203005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba618d14a4b1ad5fa667418c1e54059091b9ef479b096b0d4d82374228be56. 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/QML4X1203006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265624411d3dffc1c4cada7a6e5b0732d6e9167ac4f7787de3d8e4ab0e3415a9. 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/QML4X1203007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a9b318a71efd4f3af0896b69e31c20f89cd6c64380295653fb2ac559bff9b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QML4X1203008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d0541e1d8a24073890cfa89529d249d293f90cff15ab95d5136201e7857ded. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QML4X1203009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e968fd8681f26fb2f096bb1c5417f92f3fce1a32dcbf86d6b60c3cfa170e72e. 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/QML4X1203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4697054674836c243ee670bdc89848d13326545cb7b19f7d917106c0c66f756. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QML4X1203011.
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 0xb0dfb40115407b5102d41c1f085c5f306c6a07e43e87494ba4a41685fb019ef5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ0939771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514c87b649baea808c6beb5656a6ca198613b792025a5543fce5025530663dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ0939772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ac433fd92a3a88a9d08435c38b58bf688365e603a84072ad62bcff8d38125. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:16Z), 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/USCGJ0939770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbde4e0e27e89834e1f8ca0a0bb3ca0aad7742eabe8997e699e79cb9216acecc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGJ0939773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7304805d257af79c1bd6ecc3f6ce935b5489db4447de3906cbaf6223fc7579a5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGJ0939774.