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 0xd0d5ab68ea68beb916bd93aadb3ed24133bc42fb9d648bd5f77146c80b030ae9. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3719452-d47b-4e2a-9de3-7e0cd5e61e0e.json and https://artists.proofprofile.net/proofs/artist/e3719452-d47b-4e2a-9de3-7e0cd5e61e0e.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 0xcfcfbd41a2179b0c8b1ec7d712d6e59711451d6d5370c255ee5df7bd7f2e80ff. 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/FRZ020080250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112bbd356ff3a7f698cc4e8744453374ee21967bb1d61748926ac8276f1b4988. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USC4R0304860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1ce3a32703f7b589e65c5684ac2de8ee9aa26d07569174d0ffbc44a660f6e2. 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/USC4R0304870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a01deb4f0070f8e17eef90619d4aa57400cd39e3f0929b8a9ea2051875e9d8. 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/USC4R0304861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70a8193c2526f7df190eed17bd606c9226a83d7571c6a964f17d014c577bfd1. 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/USC4R0304871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e24d3f3e2b64e139fd42854dfcfa9db3fdf1e1a2e30da831a33533bae36ac59. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USC4R0304862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f0c28932e4447c93c71f98c8d5d7eff774715f0c26b51e2390f4d3166c824d. 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/USC4R0304872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448565142be6b7932202087b44133b9a843633153f096d6ccf5a22ebffa408bd. 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/USC4R0304863.
Cancion De'L Yunque (Song For The Rain Forest)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc2679c534dcd93fe9b1f25dd91956780bc758e890b02005e02a4280e8b6874. 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/USC4R0304873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e13c55b6497703eb6620fb03497170faaca4d8328477d79f1fda308327232f. 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/USC4R0304864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a772da5642d9c014c47877b15119d17889c1c15bf1d7e19e06ff3b5f82711f. 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/USC4R0304874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f23aa2a55c2df7e028af410d21d84b035bd997c3ebd64342cba8f9837cf9075. 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/USC4R0304865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5580450c751e6b7433b80674efc54aed23a50f1dd9fc121ab49f6726f2ead7ed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USC4R0304875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfceef65cbb38f32695d0cf03d0cb52ccbf6e28487da9a719deeb590eec1a2a. 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/USC4R0304866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880bb4a1603b3724d5b3bf1cc428212ec9be8cb6701ff33a4800d07311a4da8f. 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/USC4R0304876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5002da41cbef2089b4e4680cdac56c436c2f97daf3cefea09db99a234848d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USC4R0304867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48026aa4f62ce33a9c61bdbaf1e9a1075896518f8c5db60d72b84fcb21f384f8. 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/USC4R0304868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc1289bff3be3e492bc0ebc76d2073853c68213c78ec0947ab8d0d4488fcc0f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USC4R0304878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceffcf244e186132569a0ee8a7643ff84eb7946979099d4258796e44003c19fc. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USC4R0304869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f57be709fbdb9bb446474bc52ab53898a7ecfcf5b93eb1b155fdd753810369. 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/USC4R0304879.