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 0xff535901fd4799a7ed3c88d70bc7fa28a8e0eff84b48ade22ff6d0a832f8f401. 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/efe8350f-178e-47f2-931e-586a17332e70.json and https://artists.proofprofile.net/proofs/artist/efe8350f-178e-47f2-931e-586a17332e70.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 0xa10857ad8fa9c5ab499916b481beed2e456548ec4c4f22a6c9497b619d119bda. 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/KRNAR2235674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8bc416dd012534a38b6eabcef2260a10807a65a832041c04bda3200ee09380. 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/KRNAR2205142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6ec66f3756443ebe5cc4b6eef0ac91925ba0d86ffca0ab0fa66945d4477320. 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/KRNAR2205143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ebe15d946c768a202c1e6468dc6af9393bb1790ec0544eac86ff92309c8716. 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/KRNAR2205144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ba36bd3b8d78d04b82f398d69cdaee91a50a307e648249e18e5cff59a0e646. 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/KRNAR2205145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67244ed4f3fb4a65afc433752710e7776f65d2ae35fde7cb458d7d1b163004d9. 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/KRNAR2205146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf62bb486bf9d5bc1a71d02ac1bd88c294870f01b6755a73550393b030cc749. 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/KRNAR2205147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb95fc3cfc21cc0762e2d13b050aca59d094e7fa806108ba8b21a3f7bf5517a. 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/KRA252200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2751bc87b209373fcee745a05eb195461ef0505aa05e6d2a2bb9d145aae210. 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/KRA252200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e1e43a8890e7e7e452696613fec3666bf00a58898ecc7582b4c4cb74816b8f. 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/KRA252200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbd77acc117e2a1bf1a7546a80ddc29d44cffa0538577fcc8219f2f33c471b7. 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/KRA252200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f447701c9e275be658a307d5c9dd3d284ed31b60b8eea4016b7d03327eb98. 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/KRA252200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeff6e1a67a7dfeac5b5881b8b4b00d71cc4c06f9dc4ddbc88d1ffd882fbca99. 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/KRA252200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039af56739e1c36da81cbc5f67a71d946a2f289b1e25f38e93db2b67a6ad8bd. 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/KRMIM2141848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6fcf49e2ee163fa6377a2d08269b31a450fbace1ed631fe7a1d46124737db0. 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/KRA252100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c65e85c60283b9976b8c4286030ed28f7d7766f155a77626c9e2e0b9b1dec3. 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/KRA252100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54953f303d12a8a00916e8528aae811edeb00299cd6385e847ba1912b06646fa. 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/KRA252100407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc000531a9b30a7e8b3512fb2242adecbb060cd8ceaf6d9f3c98efd55008c0b42. 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/KRA252100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb68d1d5698513401d6386c20e9ecc488b95ee6a8d382641621f89099d9d2db9. 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/KRNAR2351294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b71ce64ae1d2dcdc1b29523fc22e3686897b07baa5841f400e8f28f64e663. 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/KRNAR2351297.