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 0x08edf13ac618dcea76f3582e681edfeb1ab8345ba5500be6b2a3f5e3784e2e87. 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/9890ed25-fb02-472f-a9bc-a3a2cb6fbb5b.json and https://artists.proofprofile.net/proofs/artist/9890ed25-fb02-472f-a9bc-a3a2cb6fbb5b.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 0x183f92138611b0030f5321bca332a95ad4485e1c213366f5704bea73aea8f65c. 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/DGA082442560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77392c78ce89c0beea986ff9f56461879d53f320c439f71727758ae437d69314. 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/DGA052404956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba707e6484c287c1d1e22ada7f2128a6439eff3e89024ce66a69af88cdb09594. 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/DGA072389105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fce7ceb1c916379c88f6aebb83de25aa6deea5a06bb0bac6e39f589de3d455. 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/DGA062341086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa50df98417f8adff73e98f4c8b817c848e43f445deffede65b46b53cba4ac54. 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/DGA062341087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7606526e4e54fe4e4bb9a1c2f8f2809aadc427961c74b0ed496fe8cb2e9de6c. 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/DGA072241832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb542e15aaa0326c1460d2990d27879d5dca20393c4a6d2c178af665b223a8a6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DGA072241831.
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 0x06c027e3bc00fe8c0286c6efa85ee29b1be5debd4145cd33da4bd9a3c6ee39f7. 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/DGA062240595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d333228130b76732088ea37da8542e01d3945d8c5b387fdea39021e79360fed. 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/HKG732268788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dd66df3981050a922b35b5958140a0a9153ce659c9d4a8a46bdbf58859277f. 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/DGA072284717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc098952ff71e402a6e7d78bdd26c8a3c896b9450a90e73fb61534f2a3841c24d. 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/HKG732248064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37dfc0acb2971eae7716aeb443d0c9e1b98ab523d0ab1d0b3ff9ac626e494a3. 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/FR26V2076955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aebcf63e09da96fb5352146cfc4fbebef334bc10f0fc44b432ecf339f4b911. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR26V2076956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdc1b36eaa65d847a3c6fb6f6ea0a1ce94cbd266a7a466b3c28fd8b3879dba7. 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/FRX872035203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313bff34fc021d091ebb364b0e428f58f6fc6842fe806e38fced7e5b9d7decbf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872035204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde470935c4d3a617e9c96e18da2b6e9b2afe0a3b55015f670ae206de2cc4d017. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX872027534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbbadb918385c80487397507327ab576f2a05299534aed7e9b5d291b335f288. 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/FRX872027536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dbf163c40811d672efc595b6e5bb5b3204429387512c11419727b47cbfcaf9. 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/FR26V2017373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e06717de1c23d1decf0ae1f8ce246c3343c9eb05095aee528d4a744966734c. 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/FRX281932857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4977a04f75614c0670dba7220d67c98e20d7e8074751ed0e7c2effa297ed3d. 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/FRX281932858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a4f7cdee6e72792b22876caa913542bc7e2bdb8d4b8a8064319b6e40bac23. 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/FRX281932860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0fde8d5677cc51382d62a55141cc3c0d6e0316e73d8c23ddaf868c52f0bb35. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRX281932859.