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 0x05db7468d0fdbdfc71e9f100e27b783b1103a734077d8ca0f6df89696d1e8adb. 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/9bfb39e5-e91e-4760-8066-701d975b8ebe.json and https://artists.proofprofile.net/proofs/artist/9bfb39e5-e91e-4760-8066-701d975b8ebe.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 0x2c71026d0336084582a64503fb7abff3e001d93ae7ccafc7bd52816f6e015a78. 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/FRX282591732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56043ffa9c14daa30f78e38a55251389b923964be40607f9efc32149037a6316. 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/FRX282591736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f46a695a5472d2fba976de43581ac44f05b75b1228f0f4e8e43b23791bd1a4a. 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/FRX282591738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fe7aaa19c869be0e73556428e25ea832cd8c625d3dc007f62c6e928322d7fb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/FRX282591740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f9327aa5ef59c1853e3869f953bb78320b4e11c1dd8841bb5c93ea7d8f41c9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRX282591742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631eced8dab1ab5898bf23a9fecdb837b52938b64e832263eabd3198db51a92e. 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/FRX282591744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecdde93f796043894074328504c0c774931b1e5dad609676eb3cce1a49e30f9. 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/FRX282591746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc21e62bf7211394dddb6e8ac0ad93d1b088ce0d54c9646c99d7e91c03b2f2b7. 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/FRX282591748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27db7a4831a346bcb4b74434c9a66dd277e3b875728672dd3b79b1b434cb6ffb. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FRX282591749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55533edf11e370517f244286bb01cf93f6555ceefbed702310838622c3f81788. 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/FRX282591751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84eb2f8f0a3581504af42ea459040f4d93b40a22e454c742ceb592c183751b7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX282591753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117e3d1e245cd900a822e0ea6e887276612305daf2143f04725127288ff03b41. 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/FRX282591754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b125059ac06432be5e9aa116c59705f29c3f57c3ccdd547fdfdf88c2401f60. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FRX282591755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6994fba66394228e75bb3dd2ffb1af663a76468284529d496d3ca25a1f14071. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FRX282591756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac033c03aa27fafd6db2a71716edb8fc7aea55f490250db68ba1b6ee0ae5248. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FRX282591757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5222b5a24f286ed97e982f91d5ee1298926292e69a4b22c82f17edde98783cea. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FRX282591758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edbda0b760df615145a2ea1ff9c607c1218dca2c77ecd1a0a38fbb257410912. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRX282591759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9a828ff95e9313fbebc72c4e374e7339ef64f1184a4c99f978c333ba59ed0e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FRX282591761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332934787e322b11d3ca72a3e69901e81450e5d931f7e4cf3b4699352571e568. 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/FRX282591762.