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 0x44622f9babd9fa6b90f40b16e4c7f9c4989d7f4cff5a6fddee0899eef4e22890. 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/df7a57a7-0ede-44b3-bd74-8d98d990f879.json and https://artists.proofprofile.net/proofs/artist/df7a57a7-0ede-44b3-bd74-8d98d990f879.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Down On My Knees (feat. Ayo) - Original mix
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 0x5e64e3373d091f1f21d3d1435c22494b9fae4fd5676cf94cb00eab51fdfe7a85. 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/USLZJ1568377.
A Choir of Angels (Incl. Dubphone Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f1a4f8f4107fda2bc239a9a92efb01589aeb2300fba3a50a51bb45c0851fff. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEH741910362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb292187eb6ace93afc7dddcd4c01b7a6320d4ee291afa5571f5307867e45b78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ROROT2019001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0acf19994281dd2689e6c8f597ebf83c456d5c1f2ea2016281e1a3c03c267e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLV62137740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a8169207a80243ae6684a25b91c48d9f56ac552a856edb66092b5b0e6a75a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBWUL2322519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172577626d244e92f9ced5bd433a23391a92f85981ca5700b83062bc2887eecc. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBKQU2413737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c226af67cebe7e571117a74a4175f69888531a4f759ffed9cd68f0498ec71a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU2455215.
Nothing But... Organic House Essentials, Vol. 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1ace622aa4edc5d3d83a978630ac9d40fee3c00001c4ea60c9cd8bd5ca9d03. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ETR212200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b286cef770da755430d6e78391985167bfe79028ece218358788bbdf4ca3623. 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/ETR212200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d033f4bab6bee879891206c07098c9c134a2b6b4c1e762c8bb0c5f1e3b2d7c. 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/UKSP42000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e71c07c268a82e16fdde4188bb860d17dc547d9d3f163562896993b4b3f882e. 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/GBKQU2154136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef4002a76bac9693a7611655a31b87609d359d9d92b3e3adadc203099ab197e. 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/GBKQU2316476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3083c9ef0d04841fe0e6d12aabccc04e85d051604a74db747142f791ba195794. 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/GBKQU2316477.