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 0xfd63e5a9d9aa0b6d5002ac8335e58e333be606fb4c96e1c56ab051e3ef840e02. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83bdda8c-657a-4d7f-81ce-eae584a15fe9.json and https://artists.proofprofile.net/proofs/artist/83bdda8c-657a-4d7f-81ce-eae584a15fe9.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 0x6b7aa010a68b1aec359894a0abec956c04a9f683b9dacf37119f43c6e1149e9a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHN2060119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a2e9d66f29ed9cd5f7d8607516ba6c2997b7d2c67fc9090364cf03d180d7d5. 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/QZWFK2320532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198b61d44bfaa6c50949be641421a789f7ee3e6b7191e848b5af82a991f88e63. 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/QZWFK2320542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191b3579da5318179c25e5aa31294a8380a6928f7f6cfd1e7a4599791b58544. 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/QZWFK2320546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5317859f546d0593bcfe87d36633cf42e8f9c6019ce0bdd1448cab8b1c8bd72. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAY2347289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409f6b434c517d3f6264dce7d56c79461bda91ab1dc1ddeddb115e2e49b05c3d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTAY2347288.
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 0x0bf15fd30b5bcd51ba22de11ddb5222fee47c6b26456220378313b96cf559348. 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/QZZ8B2345640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2759c510d6a7798754c908a71a7b3176569254ef19e1a4e5b4d4b540503cf0. 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/QZZ8B2345642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5dfcdaedb77873c86ccf9c163bc04be7c238a0c79c02da4fe4a403cf4ac68. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ8B2345653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e940b72720787e03f01180dd06ae7b781b17035630587a460ee9e9443459bbd. 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/QZZ8B2345654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf55fc715b974395a58399733bf6ad883a565e2f639dea466c1c9c05cb0ea88. 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/QZZ8B2345666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2a6bea00ab006ba5aee85286e4af10eb12c10af9e8d7a2027c4b25718aad6f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZZ8B2345641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa41876002daa4904ead9d395559b19eb42a83e9f91533a170bb2b71d843ad0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZZ8B2345655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcebe762f84a458fadfd638adfe4febd629d5a2a9fcf330d305ea2b6e14abf8. 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/QM42K2247844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb95ee875a754b25b225ae2657ddc6b2c96d83038e729909392305957ce1064. 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/QM42K2243747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582bc524cede8fd89242cfccf2103622b7f5917c092c806658044714634c607a. 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/QZKDK2274695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaaa6ae740491f62f50242e67215fe01332bc29f0cddd3059f18257c27f1346. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZMHN2264824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b26b1bcab55ddbe4a90d5e9df3fa8cac3fa076431bdbf184988d410ae0cf2a. 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/QT3F22402858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c586894e372a177d952f7db865f1133b8602bc806803e657be4da1cf537cc7a. 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/QT3F22402860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ced0e9613af920f035176e0cd8186e68dce193f0bcfa18aee05af63d5f16d. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QT3F22402859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0575f77d64b1a9919c68d88008fdcc64b19ee5e53f7dcdb9982f9681e37c82. 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/CACWV2598730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2a8d8a7b6f5e96d86537fed8511d81c49f842a404d0518eb0d2146428ca62a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLFP2541490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0733fe2c45480e8de3a6ff461c99fe85f87a30d492b78769995ba7e91a8dd7. 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/GBLFP2541498.