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 0x8bbb8760a8f75bba99ae1d091b40ff3ba7b7028d406263cd86deaa60471a720f. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c9a7093-c9f5-4c65-be1f-157d027a1d47.json and https://artists.proofprofile.net/proofs/artist/9c9a7093-c9f5-4c65-be1f-157d027a1d47.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 0x04e646ae10dd0c5b63e231584571ae5255f338c38117374e2d26d743ffe098e4. 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/ZZOPM2001854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe573e551f5eb7939410e95e2f79dbf2981e3a0764b2a55fe498b8556b1948ccb. 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/ZZOPM2002156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69986cef40b58bd2875bcaf93c57c67b700f7ab25c7e8341b347c329c02993b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZZOPM2002157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bc90c89e518eb971b5a3b396e569a86e9ea2f23192c97899e9da6c7937264f. 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/ZZOPM1901381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d444232a3b175356e8da563306e21432bbadbd7f458ce7a49b16093ce7b19. 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/ZZOPM1901555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b91ee91ebbeb7fb1be03fc86466ec2fc0a2b738af6808dbb55ac09c6e2a2f4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ZZOPM2002158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c7ae1afe800a199adc040612bd738f5f6dc56a38608c7a010ad4c3966b938a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ZZOPM2002159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda600c750fdbba676d2e36e2a11cdc2ed2b8fad45e894521a5a8d1e2290afef3. 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/ZZOPM2002160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6b698f1434b84df72c34024349904ca9dbfcc1e8c1f885a215fe002812bf39. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ZZOPM2002161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822537ea5f17e91955764f14aced8eee0726a2494d5edc66f9d87fa144fa27e8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ZZOPM2002162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad1fe40c3eed2b52485aed2c04d600ad5de07e3deccf8e4898965effb1116e6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ZZOPM2002163.
Say It Loud (T.I.B.E.) [feat. Big K.R.I.T. & CyHi The Prynce]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e0f04c36ebb87d3e8816a898e6f7c06f15b94f52cc85edaecaa2522692829a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ZZOPM2002164.
Say It Loud (T.I.B.E.) [feat. Big K.R.I.T. & CyHi The Prynce] - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baaa788f9333d30e0940837ff1ac4ee8e1ee159ae76afe2e7ebc6bffa5901ad. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ZZOPM2002925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1d6f936e8b91e828d3d02bc21dfa8414f9663e93fa708ef7256ae1824780de. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZZOPM2002438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bc90c89e518eb971b5a3b396e569a86e9ea2f23192c97899e9da6c7937264f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZZOPM1901381.