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 0xc5a7ea26feb8686dbb6a3e936e56d19f7ef24f07fbd8b342172c574c4419da5f. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c3f26cf-e4b0-4d54-a49c-6050c9e4c04b.json and https://artists.proofprofile.net/proofs/artist/4c3f26cf-e4b0-4d54-a49c-6050c9e4c04b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kareem Reid vs Felipe Lopez (All-Americans)
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 0xe4cfd437be6e8dc1a84be85ed672434ce35840982ae66cbb9f80d0b2fb0f5894. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:18Z), 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/QZNWR2587136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec535db427471f62f827370b1368da01ac6cb13f9a71bf743b86ae987a0d1c5a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWR2587137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9d899b5a95dfa5ec557057648bf2c90197fd592880f3e5987f08f33979684a. 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/QM6P41942125.
Not Rite (feat. Sauce Heist & Baby Maine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9827972ae282b9c34f12249db3d8400ce84831c8e946399cc5194cc4d6b81812. 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/QM6MZ2462293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb252eac254e7171764ed599dfc33e48594ef970067dd9ec5eb249b591b20fad5. 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/QM4TW2270383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af4548aaffc155c7b60f86f960b4e1e63131cb72cc00b631beb00dffae884b5. 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/QM4TW2270384.
Mankind (feat. Estee Nack & Rome Streetz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1c4b6f4217ffdebc823d7a898b3b1a2694605bd969e4a6e6fb76053f777070. 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/QM4TW2270386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e631869fb78bb6df5da506ef4d7b2a76d27fcd735ddabb595969f37abaecc1. 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/QM4TW2270391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee03c617745ee828f78f324f57ca0d8f52d6415f87f779583b9188a1d4ff9242. 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/QM7282027759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffcaebc2a45d2e6c36ca88d653fffc27bd20cd72aa0f72c56fb67826e7282fe. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TW2270382.
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 0x855cd7d87f022cb07dd7c228f632ee86de46f33cd49a029c7d4eafa2c6690775. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TW2270385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf5ec00c14b3df230a24d6947b1126dc665b697613e08c43ed504ff0de34bad. 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/QM4TW2270387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8453128ac6f6237f8409e06e084651f008be2b6cb1495d662e6356d211c259aa. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM4TW2270388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e58d01c751435416b89e590f64c93d3271a67f9f37772fc93c73c1c995dd5de. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM4TW2270389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62fe6825e6420f66c7180e40719687d2e7532b778f59833b8234d95b21eba78. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TW2270390.
Face Scars (feat. UFO Fev & Sauce Heist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef6184458d3a6606f268ebd0bfcc592aef5fad64fab3df26e3b55fc0fcca43. 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/QMFMF2139192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f8ebc33b8bd85c461d24de9f2048d33b520d48c51cfbefe3f38aa536bdaeaa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM7282027760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d7f55858aabdc4c9a661c1541b010a8b5916696235bcdb98c7e944f5722ba. 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/QM7282027761.