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 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 0xb9bf92f2ac2c042624f863258fb331943d170e12e591272b40dfaf05c35f58b0. 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/17bedfee-784c-4450-9cf5-3d9d7f95527c.json and https://artists.proofprofile.net/proofs/artist/17bedfee-784c-4450-9cf5-3d9d7f95527c.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 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 0x77ae2c35a62d9fd95c7e38ddd0f5d41d1089fe97c1a55d1f29b42abf2176db29. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBWUL2390494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05e64e044c6f63166ecefb3836cd92516754c1afac82f318d31602ab6f7734. 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/GBWUL2390534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d6528bbed976e002d2a4440480335b5e3a1ceef39874352e9541eba7b0cd07. 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/GBRKQ2435695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e86d13096c34f401400318675415a7e714d066559d9a00ddf196941b55c442. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTV32417637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f442501a815b9f9433b72589049d0e300bb0e3d19e2fffe255a99a33cde489. 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/QZTV32417639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d6528bbed976e002d2a4440480335b5e3a1ceef39874352e9541eba7b0cd07. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBRKQ2435695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9007a61739c2559c8dbfbadad5801c27d6ba26cdb9e4dbccd02d1332bf2ee54b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA3A2453738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a7ac04f6e1a2719cbc8e308cd15d7d4a719171ad6d8c5c446f976935007e2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GXD7V2290050.
Avatar: The Last Airbender - Main Theme - Ambient
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd506694e8ef1776889f176408716e8d81b928ac66e593133af261035278a5ee2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USLZJ2439175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26ad9edc23d23e1e6b989fc8f5aa3eceff213430b823d94e39c8ba9ad1cf660. 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/USLZJ2439176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac71063170c890bab5730346e7ad4a5c00b7b3a529ea1eae4f7a1c90407da41b. 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/USLZJ2439177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73e996719f3bba063d392725a82684c88b4968311fc7762652059f91379ee47. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee936835c44f5d0b1392b5bba3860f528e0123fe8d96209800d543f1e80f90fb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439180.
Avatar: The Last Airbender - Main Theme (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff8502946a2289cec6c12c92bbaa7e1d92ca28ad275e8fa4133157bbb7a75c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439182.
Avatar's Love (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c088f322800867bc934ab6040b269dd195e71c6ac542b5481e37f30f9852d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439187.
Leaves From The Vine (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848e0ec7658fabe82ebd3f5e0aacb9f54ec2fbac4c828de47e204e9da3751093. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439188.
Jinora's Light (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed7a08671cb19731c4e4754f61feba8ceec8981c0f830bd0fc0f74ca916143. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439191.
Service and Sacrifice (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464b09e72de3ac2b401d3609b15a3c9ac889e88d9e84cd1d7add6b65124f44a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439195.
Avatar: The Last Airbender - Main Theme (Ambient) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2e86fb893a2f1e71e210fff2d0e6cfca06af7570a1edad0c1084edef43faa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2d6c3407757df4f0355f1cfcd78d3a8da7460ee35b7a53ba83e650ac8de8bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439200.
Leaves From The Vine (Ambient) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc39c4ddc7005904b55c0022446d90b9f9afe7c8f981c13ee8593ba0a1be68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094fd97c526dbc08a6d33868444814bf11bcad72c2de5b0a48c362abe5a5deeb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2439205.