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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06df75dfaab0d1c9aca5fd13176f6497453af464ca5204ef3d9637c5be105950. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2c36704-dcb7-49dd-bd9c-4194c0763969.json and https://artists.proofprofile.net/proofs/artist/c2c36704-dcb7-49dd-bd9c-4194c0763969.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aeba7479b2f6c50e7f05d9fd5230b57b8345a53582452cebdebc8e7b6892e9. 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/QZFZ52135640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14c242da9d6579b4f0c35eb3f3863d560611385825b4e4de179b2c3a61c462b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:20Z), 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/QZHN82177782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd956fab92d21ee94dd58467852200274ffc9a207a8d3bd88f8c1639aaabade37. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:29Z), 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/QZNWW2138282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ed09f8b067312e47ba2eccc6d44be1910ef323f5255c0b14a0c5032ae5409. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:44Z), 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/QZNWZ2166537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa5a5e2990d315716b8d65806e3ff8db714afc92e4d8dfcbc4e424730b934cc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:48Z), 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/QZTAT2197535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e70910ce41257adc544bc2d031b35381d264c8890f4bc927f278fd8f7e22071. 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/QZFYY2273085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52695fdf8e700c3e4ed5901bfd9a7046184ca1d8ef8f6fbec75a4d3608b89729. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ32287949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8db2c68a6f6474ad34d30da3f7973e615e40f897fe27735293139932206506. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:54Z), 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/QZFZ72239693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe06f0c8e743c9893de95bb113505de9cb3375f93d44110b8247541bb40c40b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA62234601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddadad733e16596b67b667a232458ad04e6aa13459be2c947196c8445dcf4ce. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES52214495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2abd6e90c2ae98b644cbea7b3a4b37f17b3ea26132040e97981ab830cf9cd1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:11Z), 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/QZPLR2251041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220812cae1fa3b84461355be173dbc82ad879f33c5d8986675248b20bb9c6b16. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEQ2396162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71cfa8efd7796c537a6e8d74208f5e51f296bcfbfaeee0c714cc8c34a5413ce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBD2363797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1cefd6c1b7ce860d5f8364dc81964dc8ef76825034572cae2a90691f3c8c9f. 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/QZFZ32435396.