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 0x6e5011541539fb9ef1a7f30e01cdb7f7c0c52bcf1bc89488b737298a2b6fe529. 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/589ce7e4-f54e-4135-978b-589ddeed2476.json and https://artists.proofprofile.net/proofs/artist/589ce7e4-f54e-4135-978b-589ddeed2476.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 0x94d752500a479fad9e2cf18c55bb9ee21a7f221822e13f5d25021db322513fe2. 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/QZ9QQ2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d234dd5c650682ee1defc64a1e310a4e4d0df35cfa619bc86642a9e496d9b5. 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/QZ9QQ2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e03f11c6bcb04f0bd7b205ed05f70def79bb4996735370e7a6fd5903fc196f. 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/QZ9QQ2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6468d6d8d3e8838b9540833ead097d28b1b6350bfcf36e883dea0095540fde3. 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/QZ9QQ2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7146055a33bb6952ff84fa68c61222d172103be2dddef4e35ab80cdfe4983d19. 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/QZ9QQ2300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0188ff0186383be1f86fc4e6d9e25c564f7e88f926b6853b2771e3c8c70da50. 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/QZ9QQ2300433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399350c1aa295df00092c898deacef00ecae4b0cff59aef84a1eb46310f9288a. 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/QZ9QQ2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd07e088a0da2cb1c41dcc75dd97ed65ba9207a9d236d05e5ba4b26a166b61c1. 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/QZ9QQ2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a15d5bce8f7e9f72e27ac86e9d92ba2fb7fb132780904d30b943d7fedf7b0d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDXS2202850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae17848f986c39f07f10c7ba8417707853b6395c657624fee91456b585f224. 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/QM3DF2135756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229f06704c551431a919a5f2f837b1ab6bd645fe2aebc7523264083102646764. 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/USANG2126277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642500122f0908670e6069a40e92735ce280af5450972337a3755d98d6b0590b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2126279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dadcae505a0d839ea8686dc5c6cd8434b9f834607a983b610b6f8879078e65. 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/USANG2126280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85714c074a14ac7843453748a797519c6dec18f1bd22e8bb175b11b1da7593b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2126281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87829412e7f2c3d97ddaff780cfb2f0bc281815f67c5a3eec6c4fa141c26e00. 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/USANG2126282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441a8de75b9edde576f685cdd487e7c93ccf82b73af48a9452a23a441113a724. 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/USANG2126283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06651ae6c0a700dfd29c51e0ef670a3d56b58f41434d5ac4f0416f9729e5120f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US3DF2029159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43cb321a5ce5164ee80159b026c4565e183ad3cbdb7b80a7552fb991b93c55b. 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/QZHN92070067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d579e12a4b021416d7dcf0e1ec245f18238b62df27720d2399970e2a89cb273. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:34:06Z), 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/QZES52039670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda18497b75e6ecdf54e3b48b79045a78411387d6e2343e84eee0c99b6f371c9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEP2042924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0590dd9de85b2f9797250d7fd57a3ceaeec07220bd1d09c7c76fbba63fe24c5. 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/TCAEL1972122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63969f73ad9a990c0d5f963cd8802c441ee14dc33d82699e40d25ed19ee0b69c. 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/USDXS2303775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297401ccf27e7a93183af3fcfa3977087c1293aa59c4661a35a4d72ed5f28fd. 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/USDXS2400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c182b99297b68706184ea05967cc8df0809cca286d82f831c2e714c85b9de. 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/USA2P2501269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c566a80b470c7cca22481c70ea3f8a087c7b66bb3f0b31e09856aef3c1fecb3. 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/USA2P2501270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182fe591aa7c3b50456c34759565d41f22833259e48157964f4478dea2ed4cb8. 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/USA2P2501271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9eb16fd03c284555721ba4060cc659842031e54a19db216f4a22a31a7b764. 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/USA2P2501272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85269feae2bef67d4044efc9e33ba7f1e7452d10f6e04f56cc94cd7856793be. 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/USA2P2501273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f74db59b5cc0011bae572d0bf6d00b99207db46338a69a012fed8d0f362bd. 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/USA2P2501274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325ed52ab89f963c213d218f335887e17d295a1dd0a25668ed940d4e6ea2bc7d. 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/USA2P2501275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb30f0aacdfefaeb86207c491263e050df0b6eeef074b4e5a175c866f5fd857. 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/USA2P2470444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25cf0cda093a6ac763eb4765a6f5d0843f71e2154c2c9fee50ca13b503b1121. 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/USA2P2465210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316c9ef705e72346f4b1c8be6005b21a7db6fbdcf1c66f5be35096fc397e2f78. 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/USA2P2510639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c5a221de8fe1e4ea2874c9ac076a6a9bef73fd92485e6a67d202f7e1633faf. 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/USA2P2505960.