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 0xbca162ec0fbff28425b8b2ea4df68b3648118cbf36e759f69115f75906da2b99. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4870110c-51a1-4d40-96bd-2d68abd279ac.json and https://artists.proofprofile.net/proofs/artist/4870110c-51a1-4d40-96bd-2d68abd279ac.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 0x5b41c47331b1dbf736425949e3d26bc68f4211759cb3464e84dd230973c2b54d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWP011738301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0316e1079b71fbf396b138b5664b1e9212099a87d347ad9916142c999a2ab7c. 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/TWP011738302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edd249afe90b7e6ad2fc2785fa754149044cad42b6809c2f81be049407384ab. 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/TWP011738303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1774f74c489048d3c912c1a916072249dfe61edac157490262d1b3257fddef. 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/TWP011738304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cf4767c95687f9bc338d51d523cfa7158c51c2e54f7c68ebae6abd875ca5ad. 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/TWP011738305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42ede12307be01ecba1845984a86726071491dab84952db4a70bfa2adacc72b. 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/TWP011738306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6fad9d1085f109f64f28bed635b3fdc8bc004773c8c6f7b5293a83e0184b65. 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/TWP011738307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1127a629b836aa32b984c9fdce681ab74489ea4da67fa420ab4033795829b0. 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/TWP011738308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dd8e9bda55ce85a584dd083a57fe1dbe726646056451a1436797e2fb2dbbcf. 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/TWP011738309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1056cdd75a7c8bdc35741465c27293750069763f27087bf913fb67a177b68d39. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWP011738310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388f2970bb4d7d1c533f282ea96c5b2d742f3721e54c10f3c233d96dc05bf221. 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/TWP011738311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5823ddd9ee0938e3b6abe8d929b36a3004f088b2f0cb17a7fd0b4579c4d85dad. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/TWP011738312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4696a05470f024cc2d08f67fbb956164c2819454e7982c38b50beb6c56c065a8. 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/TWP011738313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d35bcc7a24703379af6bfc71f666d8bf0690e90d5e69eb5296c4d53ada5aa7. 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/TWAD31400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c7c706aec28f1514beafb4902a8c5ea5a88d9525b188669426e02a003d7595. 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/TWAD31400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b7cdc7217e72eb957ae872bddb1cf0019e342fab0580c8e9e0d44897554433. 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/TWAD31400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9bd44448173768674bc93526964b59fcd7c624da9e68a79cfda770787fbc3f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TWAD31400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775cc18168a6e2d376502c041a61dcc1037b8338dbdbd80b204926bb3fcdc0b8. 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/TWAD31400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc959680dc797778c9bdcf75e6ecda881bf8e1155d664a977e78d944f4907e. 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/TWAD31400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49819c7ab9b1e47f42f6e3b70988f5fb0c84bae4ae40c936c495742e6360aa87. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/TWAD31400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0410aeb888015f78f32e8497f612a04d32742ca57621f49551ca0497c86cad6b. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TWAD31400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd62649286c7121d673b98a34c7219ca4ef42c6c9451062f94588a8db29227f. 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/TWAD31400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b488a88299758c4a588906cfe090eed6aa7a82ff7ee147f42af6f96b048c96. 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/TWAD31400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0632feae456a9cbab3f133b873dcf41ce5faaefbfaf3204a283730a1252d6a63. 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/TWAD31400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42015750a7a58f8e295a5af6d9ac2b2d0051ecfd8c75e3673222ae06236525f8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TWAD31400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcc1216f97b2cb2436f306f0671ae1bf2db491819ed9f6470090a812de39acc. 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/TWAE32400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c96e700cdaa7064cc452f68abd899fd70d7b8312bee049dacf1c9d255006e62. 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/TWAE32002310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba19345aad84b1a709771a9081b9ed25d49eabcb314a083f663482f1f31e7401. 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/TWAE32002311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfee87b258ebaa5ef714d2d522eb3d5bce4e0738b112ff0cc0b1ab05ed4c4e8. 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/TWAE32002312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaf33f63aac2d9623b49ad123cacda3e8aaace36f0ef8a1c720044b5930649a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWAE32002313.