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 0x4ff11d4da1cba0890b05068855180c2090e144e600187b76b9354cd9263fdadc. 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/b0287f9d-bc73-45dc-ba9b-849778ba9663.json and https://artists.proofprofile.net/proofs/artist/b0287f9d-bc73-45dc-ba9b-849778ba9663.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 0x5cd37f4f60ff1714f2fe990db03a945fb6520a740124df098bc99681babf97ed. 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/QMGR32023285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760a590b4992a1fe288d47ed0dffab94feef8d28c4d7530a64dbc2f63bc37b5b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEO1964294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f73347bb359b13a7a7c59be2077eddc274c1b5a66cab9e64372795e93a6b5e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/UK43Q2007763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e25ae626a3794bbea0b2041418a559fc066c659972fb2c46aa5371bd861d06d. 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/UK43Q2112366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ea0040b390f926f05d14649a959ea448f4ac22f3e929008e64cadd4399fa99. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ZA56E2101235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ea0040b390f926f05d14649a959ea448f4ac22f3e929008e64cadd4399fa99. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/ZA56E2101235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bd5609a995a41d246b16076f6510d9d6e44dbf831abb55f2b1233d539c9539. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ZA56E2250236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad52499cdd1945e23b4a17701f6003fefbcd44b6820b41aab20d8fc461c6f955. 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/ZA56E2150224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e6dd94e32a2647b996c330afb53a7edfaa84423796b0424c09dca1dc4202bc. 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/ZA56E2150223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a57e74dadc85889212e6988487766a31221ff636ac1c746d6fd1f2eaf43aa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ZA56E2150061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7e4249a0cf299071df564caa0a528428f4707bfaedaf0b201f267d9733ca5b. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/ZA56E2150225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795bac87fe9741b9fa1f1b3ff0fa023645d4a974df913c9d81ffce2c9ddffcff. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZA56E2250218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0902abcd4e75f0526aa6cff73c0acca66eeaa0c54f3be1fa0912224402a8df25. 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/QZKUS2306351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5359b4110f72f9cd57214d33d31d18c0c83ca6fe2de84e49dcdebdcd9b6a857. 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/USA2P2354942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a76dbfc7a80100aa1229466231ceaec3c03cdeda413c1267ed16bbf853a8c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZZ7N2452050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043fd9b03ca770932623ac207a755438e5dc273d600f4f8fcf0170895e49bf3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7N2452051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889bf9b4cb3c724333bd745fea328b33fbb03c48e981a9b4841ba04df702af5c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ7N2452052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6055dfba444261c0546eb2fb69eed03aa6f6bec5955b9837b4582a07c656674. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZZ7N2452054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66835939698690a377d461a3a3e98132cc02d7d05e12af68f3b0332ea0703c24. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/TCAII2451691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9809ed0ca963fddb1820188038d6369717cdd99782db7a4ce228555c6b146483. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAII2451703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d132b4ae96ab79c7d6840c5b17c01174e681074f45cf977c865a5001a73b21. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAII2451745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4585e656b40a8bfe22f7078fba8d4fea2d68f20e680f24389a9bdef013f0f1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAJB2498272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1241671f48c01d11e0ffc9697d4bac0b77d6a0292b87d6c91898680336c3c9ed. 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/UK43Q2008336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f0ee1b364ba8d00f180700ad5c53470f12e7b44aef435fb0e11be93f8a1e29. 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/UK3AZ1926882.