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 0xfaa4c321380d03a7a62492c207a8c0bfaf5199dccfd6336eba25bb33647bfad0. 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/f2b61352-9bba-4d37-8c49-4f453b041fdd.json and https://artists.proofprofile.net/proofs/artist/f2b61352-9bba-4d37-8c49-4f453b041fdd.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 0x280a94b39e1e874c68659880625bc40a5f79c6202c8927f67400c35802fee76a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKPL1811968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2058138240e74262d280aa7b2b85db62a8db5ac57919cf0d2ed412daceb41ff. 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/GBKPL1800837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dd98e272821cbc66e10fa47ace3ad7d6db8c8c55d7b09a944f4b17d900e01a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRX202054804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce75bb0c5be296444572f9fef0ca8865d6f7793c50b0f00d4d1ac99eb0893608. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DGA062037805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ba8451395d82a87b38b43f1e533842077fdaf89cc5e24ac77362e6e26fc34d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DGA062010606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb524db97aa562b9ef8b32b1ef76175514a4dd8b2dc41b01445c2afc7b2265c3a. 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/DGA062022093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242cce1b552c7afbb5f5abc0733f5c05970b4f53efd7496f93a1df80cc3e81eb. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DGA062037807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdab60a7605001be43b2f6b4757cbc1c7c3e6fc54f3471ea993b9ff19ed7c8f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM6P42390162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55538ee0b455c6dd6ed0946bfb2b8a5754f52340cbbb3cf0c4c7b2f08531a7e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM6P42390167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38715548472af3048b8995172bb85154e80c97b20a3425212409b81ecdea2f32. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QM6P42390169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789ad2840091a511db7e2fa9a84fc95aecf15479b4932b7381574115e185d6b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM7282463472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe167353c153f673f7a233566bb589e9ce4a596ba2b859d691e7e246874150e16. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QM7282469468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f31af652687c8d62e6cc74d3c4703fa20e3d4e05dc473cd490c57c57e2bdb8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMDA72405858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f8fea8f384a906ec8aa8f20c80e62c6da1a8f5062140913bbba9b657ba4756. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QMBZ92418654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f31af652687c8d62e6cc74d3c4703fa20e3d4e05dc473cd490c57c57e2bdb8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QMDA72405858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af43cc81d5d565eeaf91f744f8bac3ff54e11321511dd91f5c76b261efa4dd7. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QM4TW2530844.