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 0x4c275434e8dd5ff7dbb143260739ca986b144592eefbf865ba2889e4904968de. 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/7d8370a9-5e76-42e7-b7b2-24bee3ad4ac9.json and https://artists.proofprofile.net/proofs/artist/7d8370a9-5e76-42e7-b7b2-24bee3ad4ac9.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 0xba568d5ad7c30e2c6de6efc488a1e943ee9b57023b7076d406291fad2dd54af4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHNB2199718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f5f7f8ee27ef805f4b4a2be64100b1a9fb6fbd10ea6c3d0a1f5b219a4ae4db. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNB2199720.
E Jeka F'inu Didun (Let Us with a Gladsome Mind)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a038d3003d7897f2d75a2d13a2a39c866d4a594bc7ba2560a41594a6a5758b. 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/QZHNB2199721.
Wakati Adura Didun (Sweet Hour of Prayer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f92c5a3b832c52fb981fd07704ca6a959779e2309fef7d4882d53296d0bb7e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHNB2199722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7da4b4bc88ea2f2c768ba6e9e90830e0a7447e4d99fb212e2b8ba4aec26d0b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHNB2199723.
O Fun Mi L'edidi (He Gave Me the Seal of Redemption)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea38f3ce7a7274d50f90d39c5c01754fd6262aa736278da096b33d1fd5efbb7d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNB2199724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a7f8726fc2bb37f6fa3cdc744bfa8dee3da5016a81f82ce4873c4476303b3f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZHNB2199725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5f2fa5d82f59fff433928d3e491fe31464174a4156506f019ecd9570f117e7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNB2199726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a4634c5423f132aa5c9e238a6739fe50e12acf0c34ebf5d9dd6de87f8a518. 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/QZHNB2199727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328f9aed799d68cfcb3e2ab1f3d9696361a1859aec8b09c5c20a405afb46302b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNC2100521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761573d968710e0e1b56fd1601c9be84d2f82e8ddf6c9919d3a8876ad15588cf. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN82038225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76d8c2500541cce2560a51cf797792b1d2e6461ed5e419166f93022d4385f6. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZHN82038227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25108006a483f84d43b1cc7df223da509124f3c857b1ef7d2b5b7222068dd7ba. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHN82038228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6360bdcdbac1e34f0317fe574319c1c10fa0ca2ea501fc33138e666500caa57. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHN82038229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90053df97184507c55bc0b916acf863f8a1f3a6dc1f5ff9ff65619e4257e1e1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZES62125275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7b986e26d55184aff631f5c446cb1fa1323c7ad28ff75a502b6096087a6a27. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZHNC2100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f00ef4d784fcc2088ad36517dfa1dfc076ba5725885724f1bd8b822bbd4cee. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZHNC2100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f05e5203f5e8ece016348b2622b2914a4765b2769393e1fb23a2e42c1ea6bb4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHNC2100528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983cf6cedf69c9ad94bebaac9c371e5229dda10a162cdbe6fe929b470c1ddc54. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHNC2100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5263b8c94bb1eb236e87489e765974b98bcda943e3ecb7452be4140cc61fc547. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHNC2100530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec05c737093f35b55f4261cf3a335da1df4431f49a69b10d9c1d64da0a30258. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2100531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d316a65d6f3fb1a8262c5b1b8c0918a436130a4b8d6a6193dfb35878c8f68d. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZHNC2100532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74e4bd8b417e73b1b169e145a098b1ec9bc4391e88ea0ea540f295796b768fa. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZES62255124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f78c0812942534112e9398da335bacec2f73e3c083662e889b830e381074000. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZTBA2253777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab79966bef701913324de1ef9103a264a6a007d0cb514f7fd7efdbeb66f2aab. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTBA2253778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8519032c2e07b5e9d21f1ff027200c9cac9a9ba4f8136d17d33eead9853165d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTBA2253779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b96234ca6f33214d2659e0d92f77a75da7691fa74a00c182cc4e1d16643168. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZTBA2253780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645264a8f8eccd2e5a14860792ea600a5c8dd23202c49b3a5e0411168079df13. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBA2253781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a60490e62b6d4a14da41873566903b169bcbe930225b4ca73f5825a94f7d4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBA2253782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ba13de219b66b997c995036935c0768c25d57c3f6fb948f485f3a8fe4de5fd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBA2253783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114b8bc7ba6ce004a3c27a9639eebdb3abeb9ee9a0673b5b5b77acce5f3124d. 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/QZTBA2253784.