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 0xbb22d72ed40f61f49e92c12a328d9f95f18dc3acc40cfec25f414e6cdcfdd80a. 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/25707307-fc3c-4b82-83d9-5a0160449a65.json and https://artists.proofprofile.net/proofs/artist/25707307-fc3c-4b82-83d9-5a0160449a65.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 0x309343383031ac58d157e6ba1707a36b1b60080dcadd846f217e023fd363c997. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/FR59R2345618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6414438576fc4326e6b595402507781fe3c4a19d50fd66643c1839e415bf282. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR59R2345621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbead32fbd191cd62475fc754490e099dc25d6e90ca031dc0129078b3e0c46fd1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R2345622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8e4c0542165d8623b347000d686d1f1bf2f5cfc8b75bafa8614012cdb0a6c2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR59R2345623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1701e042c4bc0d27e73455051437102f5ee19eb4ac0a4bd91dbb340521d47600. 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/FR59R2345624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe181c61f0dac41950406389de2db7aaaa05fa272bcb9effe9d205be131ca309c. 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/FR59R2345625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853d58d13fa6fa981975a4ab496314727539e04a8699494822c231ff1c14dcfb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR96X2346046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb8016373dea5bc6847d756e10b723183ca43576b0b4ae6a8c22319070e7b0. 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/FRX202356369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2553dfc48ed45f9bd4a36adeb8624b329bc9f7dcf26787c38c79ed8590cd72b2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX202356197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9d0fb8a8c6bdff5e1c04bad643af05030b298a834cf564ac7aef16229e0893. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FRX762364556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5799b983cc15c816e67157cc32e12d787b4abb23d46763567bc081f8cdac65fd. 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/DGA0R2339827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45191bd48cc2f4ab8e046f186137ad770087eb18ea8f72d4c2fd39ce30025c5b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DGA0R2345392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8810636db1ded309b75d77c21a5795731b26a1bbf706b33d0e60d34edfe37f77. 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/FR10S2483298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b40e65dec4b44c51ef0b34074e6e64e7b8fa2ef596db4c8fd4f9b1a47d059. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR10S2483299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14426dd2962d7155578a4506e2026a917aa3ee6863f05e40fe056d4f10bd3896. 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/FRX762444294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf459822c28b564cf67e9c2c95c5d31e2043a2594784913490ab53efe51f96d8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA052488777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b27d1556f6496f50c8ff6b494794ae72d5396f370cef296a937351a10a36d72. 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/DGA092467816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c31112432924152c60a2988b4236962966365f2d59c89810bf4d54d7d77a75e. 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/DGA0M2461372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cc5018fbd16664afecff4f64ce68ad25b8838286c764b42f992605b4437651. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DGA0H2424027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102945e71642ab8c1d2fcf0a3dad25094caa7739a5bf53a3b41858dc4b0d25b5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FR2X42529962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2c027773bb29e9b50cf4ec5d738bfa24ab85396a308aae43b8a673ebb812a2. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FR2X42529964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0a3a24b68af5c79d1cd2cb2094bef3273c8993e455ea2dd991ad2f5ca64477. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/FRX202559106.