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 0x1d4cf8de2bbda75ebb15f93de9113b6b566aba0ff0c2b32a1892081d8c39a049. 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/f5571b4d-9fd4-4b37-9650-3b31adfaa8a0.json and https://artists.proofprofile.net/proofs/artist/f5571b4d-9fd4-4b37-9650-3b31adfaa8a0.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 0xf40b7f6acfca15d63037a17530c544d6626d92c0b8bbd72ae59009fda9c7367b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPN2047140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a28f46f09c06e6c9473906e19e6fc61ee5cc82c62219ad4fac36d93482a88a0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:08Z), 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/TCJPN2047143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a5484bc51153fb0892e12e308a12f5a13fba1b11e0323e776f5701a9f92feb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPN2047145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40b7f6acfca15d63037a17530c544d6626d92c0b8bbd72ae59009fda9c7367b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPN2047140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a28f46f09c06e6c9473906e19e6fc61ee5cc82c62219ad4fac36d93482a88a0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPN2047143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a5484bc51153fb0892e12e308a12f5a13fba1b11e0323e776f5701a9f92feb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:12Z), 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/TCJPN2047145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ce42cd7d43d88d612ecd4fdbe72409538a9a0201cbde48811b587eed484fd. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCJPV2334519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e9def0447ebd461c8c8299778d15fa289de1f83500b04cbbea9150db07514b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPV2334589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cf892e18c1cfda6eb2d2070926fdff4b3a6c7eb110660f8ad1bbc531bf8b5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPV2334606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc673a8cac2e83aa9fa17c7a6173a8829783f16180cd011614a0655b77fd25379. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCJPV2334615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7131dd00f7b3d3c89be80c5653123556e8a57a2380ca9bac610b491733c40978. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCJPV2334628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a71eb9321a0ee45573854ae909d0bd021caf840011b06687e41cdf8fc1e735. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPV2334663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cffc863be5615086b007a2372613d8903bb6afaed221caad51d2a1d3ca3c5da. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCJPV2334599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cf892e18c1cfda6eb2d2070926fdff4b3a6c7eb110660f8ad1bbc531bf8b5b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPV2334606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc673a8cac2e83aa9fa17c7a6173a8829783f16180cd011614a0655b77fd25379. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCJPV2334615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7131dd00f7b3d3c89be80c5653123556e8a57a2380ca9bac610b491733c40978. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPV2334628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8a11b38c2354f5926f1f4477be3d6cfb74a6bbdf6f90cf75187b166205ad31. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:54:58Z), 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/TCJPV2334635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be72a0e412e781e4cc3b641e1e36ea242d02113f0972c137b652452b2a836da. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:50Z), 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/TCJPV2334639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a71eb9321a0ee45573854ae909d0bd021caf840011b06687e41cdf8fc1e735. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/TCJPV2334663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf570b928c2ff7eeb2a72eeb51a02266f62934b30c2585d057111077195719. 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/QM4TX2496306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7549c026ed061bb200d67a4fd2ed49d27470d116094c791c661ac3c9a933aad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPQ2108577.