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 0x1a2c8bcd3fecc3bdf8f3efe7efe8e17d9f61f7cecdba32fb100cebea9f472ab3. 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/00596b4e-15ee-4644-8d93-09fa36284ff1.json and https://artists.proofprofile.net/proofs/artist/00596b4e-15ee-4644-8d93-09fa36284ff1.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 0xd618f7ae7aa4a45f01cb08841ab4d0ec3f87ef7b84efdcf817f00cd522ca73a9. 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/TCAFM2129624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b851e7ba4dd80891a84c8f52445bb11bd155c8da6d08f3e6528aaa7502ad828. 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/TCAFM2129633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9bbe9c8a62adee29424f3976de43b5d68de6e0a6339569a090a181affc2887. 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/TCAFM2129654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629c04a256761501e75a74cae3053f0e42f0bbcc4fee187a29d1b3d9651d861. 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/TCAFM2129658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3779f030bf2ad7d3184b2191fa518fd7f3e6c43cfe727779042440c672ba167. 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/TCAFM2129664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e994c950eabfd77f8953bdaafd1e39b1cf9b8385ce4f612944e1ff7aa97edf2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAFM2129598.
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 0xceb7dcf16d2975b85198e1befb7609bd864e96c896c9dbe08ab6c41a9d2f52c0. 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/TCAFM2129689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d867ce53287fccfb59d545f73bd2c71c522acc405c442f6fb0737d96e1031. 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/TCADU1861275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eda908ea685f194497ba0229c9db63170575d58f60cb2a73cadd38795ba8af. 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/TCADU1861279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64645f05cce58d14f0411eeaa39a1ea5877b416a49166a803b8bd413c1a2e6d9. 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/TCADU1861290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9447f03772fce4bbcebd5ff7b9bcf5a3ad4b0e5614b8920260e75c388e631e4f. 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/TCADU1861293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1539247e72e5273c774c96dcc6ce159dc243239402be73ab73b8d4b8fc22b539. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCADU1861298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1039ff3890fb05234e5e971d4e2b159bb46c632a249256c52cc952ae5a6bac. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADU1861299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b10bf5f97e7d4343d6dbe7d98c63d90fbfdc1d178a20deaa566dc2e324dd3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADU1861302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fa144246f3caafe9043348e3b3a1ff5eda71152c617f138de3b7bf5d998638. 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/TCAHU2405794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2220f74a709214a6896cfdb63b06de2b4b3932407ab513edeb43703150c361. 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/QZZ8B2356786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8e9df4bd5f7edecd37ac21f0c69b32cc33f3c2ba0b03344ae11eed59afc90b. 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/TCAHI2301820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b95b85ed8c22a9c94423a46f5195e4f0be6e7107e8f4462a2b4a26e07b72355. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TCAHI2301816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffc0f1fbe7cc6ee4069bc82e7b11c675bda514d265356b64807dcd34d75c725. 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/TCAGN2270210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29475c7bdf9a1ed89c1130df20318102e65083b823b31d273c4e6e4204226790. 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/TCAGL2209293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e30d2d25691499f64c22803d1b8a045b8db5edfd7147c419fc371b65a7b9cd. 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/QZFYZ2218771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e15d850984a3ac45e4e82d7cc9f3f28f94746b7dd70f9af931e7803403498e. 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/TCAES2095926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62caa2e2f1993de5b7831dd37291e3c51942a8ebf2e653bc3d72b12195bdb471. 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/TCAEJ1942930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb07cb3a7596d348de84bd1147bc2197d04c9ea4f6807382251d0b84aa64e8a6. 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/TCADC1708671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08776898ad401c3d6328b42d46e7db8360566e94f956c010d47c4640c1ff392d. 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/TCADC1708675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08112ea5df9290cb22a3f544b357b737eec9c01def7985bd7a681549428137d0. 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/TCADC1708676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef67b5894132076e420bfdd8e8603f39d8fc78275d5fc37abb3bc21258b5a24. 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/TCADC1708680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121bb5bdd142649212ae1d22f33593d9e5e3af2d87bd2a0de14075a3d86923d1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCADC1708683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ceb472166da45c217e1644b5a01f85c1ec67cf3ac4267f293a7aadf1e1f4c92. 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/TCACS1612591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3efd9ffce459a035a686bd2f56cc981fa5fc5fa9d1007526173649ab58be2c2. 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/TCACS1612597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6abf818ac8749cbf556ba57cfc3da181d17dffb15b01c1ef8919cc5fced0f2. 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/TCACJ1510718.