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 0x5d03a47338ec83f52d5367a17ace98f853c2edfe689fe39f0a452bf0d9c21443. 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/1f77b5bb-304b-409f-80eb-a46fae70e6c8.json and https://artists.proofprofile.net/proofs/artist/1f77b5bb-304b-409f-80eb-a46fae70e6c8.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 0xda300aa24702328e426cc470efa5cdbe6a9c10fd6e00de5907013d8472a4d3ad. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FR2X42260978.
Instrumentals, Vol. 10 (Brewing Up Instrumentals)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe965378c886ea015af858f8a07872c8b65399e970f06b1608ad5842770bb34a. 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/FR10S2296166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93b52a8399fec4787f93e91780b6d68438dc74cf7eeb61e66fbb4fdec7c68e. 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/FR10S2296169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79bd044b285a5ed0d08b5b8f3c2fa2b74a6796815b1e0996b74bb587527018e. 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/GB8KE2329543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03df9f60fb976253b6dcd41ee7062e2bbf1a75e6958b7892e8bdbfca5e46a595. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB8KE2329550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5d45d16a1601d8deae89e2375e0606881619127c832ee882214248df25c083. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/GB8KE2329551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0106d6c3bdd9bcc679174b905d2f37b3051078b8f67c3aed8b9f7e702f9e9ff9. 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/GB8KE2406753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb898ba41ed9476f33bcf7cb973c9aa4955ebc4136e8dffca5ea96c8645437b5a. 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/GB8KE2412486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720cf75a46f6d6b70698634b767696c84c8538ce056d22fa8feb2ba50932ba1c. 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/GBBGL2212880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3c9a4b5aeb4af872fb28d2c532ee7cf2d50aafb682c8d7bf76a18ed5dfce65. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBBGL2212837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199200af6de0e4455aa44dba16efc9310c6cc35a584d3a91594bd4152e0384ea. 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/GBBGL2212795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8c5631ddf5b1840b0ca6790cfbfdc11590610238137fc0f1ea5b25153e2b8f. 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/GBBGL2212812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3c9a4b5aeb4af872fb28d2c532ee7cf2d50aafb682c8d7bf76a18ed5dfce65. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBBGL2212837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720cf75a46f6d6b70698634b767696c84c8538ce056d22fa8feb2ba50932ba1c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBBGL2212880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4018378d744272e8a4b483753928ef2cbe96f0d3f6e1eef0d758db0a18ed08. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GBBGL2212862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac9fcf2acaab277c30f70563dfee2cf20c9e517f4004feee3acb31ed15b6b92. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBBGL2212803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9be40eaf625cc7ec603d1fa973882deb32981a53d9c966fa7967b9481f6f9e0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GBBGL2212845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd148abc5a30e03499c560d24d8da585ccad7125b2449354b2c6c25403b8b0ee. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBBGL2212853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c01e42a6191874513c37161bf1087d2389bc7338b5281f9bd6cf002dbb840f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBBGL2212821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec67e9409ec0283a6488036555e461243d39b631e105ebaab8c3c664f03098d7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX872581916.