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 0x39e139ccc96d1b08b6b6e84682b7385808782102216f65ef4706a711a2694723. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2005421a-8b5c-473a-8a01-3c4a42db4d8d.json and https://artists.proofprofile.net/proofs/artist/2005421a-8b5c-473a-8a01-3c4a42db4d8d.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 0x60c10b93424e7902327bf97998e19da74c1b19a887befd159ae8032bb232e8c9. 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/QZK6M2024577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd9b3c9d481e22d9d1287c9a598256f839931f02d8261b897d9af1c26d7b5a. 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/QZK6J2048675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74c14d99c78d82c00c42e258b9bf1af97457de7bd23b7cb922e56640a53646c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL3JA2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880b32cd4cb8cac02c3f2a379a42acf445975606665ef9509bd470d706c941bb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NL3JA2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760014260dc8e8953ef98e39f17d292143effdc32807502321932865834efc0d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NL3JA2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a62fe1e876d6abea4bac01de03059746be60ae8a3427929b563c155dc7c0d47. 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/QM3DF2146892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e008a37b36d870018fbdf547fe178aec8999264091c00264cf7e1f1e6f503fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ62495065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f511bc8dadf9d1189755baad614c441798ed05b9e4d48a6ff672845fc71759. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2017423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ee8d5dfedffbd75e1a16bd498f7aaaf8edc544c9b0eb4a0cd4c7081bd78687. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ62495066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a57b997cfdfd018d6ab2158dc6e3bc6b2fa5d644b6ade25e29b7657ceace47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6F2017424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c10b93424e7902327bf97998e19da74c1b19a887befd159ae8032bb232e8c9. 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/QZK6M2024577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a73e53666d050ae02b07c4f009a6aaa87aa7dcdb1a18725d8226a04c121ec8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ62495067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80925b2832f06fa02204a35ee6c7fbb17ed8eef12d351e0368b333443715312. 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/QZK6F2017426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e76e99c01ae3e788413778bcd74b956bbe27b6e53315b89fd0f9860721dc56. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZK6F2017425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9ecbd9768970f53e505df3d7debc9ef6164d96f017aa9efce21d9505b17134. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2017427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b13b3a367ef999b4721e5af83c22897dad7e6326aafb766a0b594a8831ba7fa. 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/QZFZ62495068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd9b3c9d481e22d9d1287c9a598256f839931f02d8261b897d9af1c26d7b5a. 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/QZK6J2048675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2287d2dff933a61f961d12a4df4418805b44b6250a7530148b03cc5b483f81. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ62495069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90a22abf7b75240a49731fca85441a46f216539b730f907be2c78c9da573b00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ62495070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7907f7780a03727cd8b45e268637919746d7925512ca828adb5558cbf9ea92cb. 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/QZFZ62495071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba666d8a9f98b27bdf636b7d7c1bd467bdf0872e0247d959f8e76be7cc8ee3c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S2400717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81066d793d087423cb7f09351b3315c21890cfe546bd1f261458c6c7b7de821a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S2402905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158f0cdb6cd6b0b0c2c89aa14b2d443dfc8e03753f29078c762fc2892a60ff33. 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/QM24S2404040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6fae288cba00f2730af2d645fc1c3f829dc4402e1715959fd14b98bd51ceec. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:05Z), 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/NLT2H2400819.