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 0x99130f536093a20efbb9584901c844d0b9c2d429b765495e8c402c5ea9359687. 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/38d41c5a-cff4-4f5f-ab64-7688805e94b4.json and https://artists.proofprofile.net/proofs/artist/38d41c5a-cff4-4f5f-ab64-7688805e94b4.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 0x56d0379bb600595f4f2251954239bd4067548003801d9d58c243f92b73c99e39. 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/DEAR42234446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6dc02c180f8927ee325a761fdc329acf5be837a41af16149fc0d9718e32ed1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEAR42242246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cb0164585e4aab60330c36ef8c91b61a53c1cbb5bc92073d0f0b4e57663e5a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAR42244554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f5d8a01e371de505c6621939956ef77356b64c8d0f08671f5990670e482de3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEAR42267708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181a259562b2234f240632ac542f21d434b65828e8a09c37fcfefadd1263281b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEAR42299362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae895845010971ee8f14c0582ebe1d0f5e90794296927046917e73875bead450. 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/DEAR42291248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74718aa07a2efa804a5a0592e7ba690f028b5eeb9b46526c262f54c95c09fd9a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEAR42243824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacb7d62f68af3243be8f4adfa57ef7321ca696aa3335ae9e3cb5af6dcc9e698. 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/DEAR42269452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dcfd20a61e7a999deb8bcec937a5e4aea5aa2013bcef1028f4de753feb97b2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEAR42227938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1729846da96d624e6788cf0b21f485d5eb0b342a3b17a45abef9be8c324b4e38. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEAR42288713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24415e3531a7e7fb162aafcecc307609da06e12bd5c3723d5d61fccfb803e2e4. 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/DEAR42250327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed1331aae934f981f04135b586052ad424317f5168b7ff43a841c50315b2e1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEAR42229037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb00f0f488071e0b19904c8508ea820185626eaab86cc9f8e9f61935cca6a0d1. 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/DEAR42244017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76553bb96ba2079e03c7b136afb33df2b6539a3aa39248c447eb86be3c795539. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEAR42219359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f0b96c1b7aa1cb769bdf0c530ae50991ff300809e02ce0076978a9e39298ba. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEAR42268336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496994fb152efe8bbf82f6b295bb79ebeebe70ca1ac24c57144b9d1041a9b985. 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/DEAR42260828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2377116f137657c01c87d8e02e08a015d6ccb7ae24bc35174ae2e4bb9762d59. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEAR42227464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf486f03fbbd30462745f7eb131e9c07ad70d3375cc0b022bc10f8064e3893. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEAR42293889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd68a367abc095ab7a930ef02af9fdfdb41181cb89483e53abd24460e7d1537. 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/DEAR42246291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5159e892f7c5b4cdc46051b1694b8ba03b2de0c9dc2bf1fd6f89ae1f0b3fcfb7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEAR42290484.