thumb|Cartoon showing William Ewart Gladstone in a dilemma: If he climbs to escape the guard dog he will face the man's wrath, but if he drops to avoid the man, the dog will attack him. A dilemma ()
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 0x1c423d67a1d2b83e1ae9df6236cc1d0e3b92c52d6db65cb7374171be4e69d508. 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/b73e408b-d9d8-4471-b0cb-5414dc394e79.json and https://artists.proofprofile.net/proofs/artist/b73e408b-d9d8-4471-b0cb-5414dc394e79.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 0xd7f2562441a19570bd60ef37b693ccb332cbb5b79244b6c1983cd6a4e194674e. 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/FIKHY1700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b575fe0d7e19ba966326fe4d3d7b7dfe590af9605d30cbe5ec55574847e97. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FIKHY1800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e42279719cf074d31507ff0333d0a84ae1149e469679cbe52cd388d42584e2. 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/FIKHY1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e71106b9f4fdfc82eb227f21a18c130a3a53cd1317d1fc2fa925c26fe1691e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FIKHY1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68ef647c38de2a894a23e5fefd988aaf3ffccde4c0603626f26ac3d2c61ce51. 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/FIKHY1900015.
Aalto (feat. Diison, Tuomas Kauhanen, Paleface & Juju)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca95dc0f3b81e1dfd3bc688f85a4d136f899eace3077a64111155dae8dd5c3. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/FIKHY1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca95dc0f3b81e1dfd3bc688f85a4d136f899eace3077a64111155dae8dd5c3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FIKHY1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19320a16840e76ea8b34826f9b3df3315f07ea5c11426cda09aeca36ce08727d. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FIKHY2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db4369c6fd4c33b7efb97218656f7a36896838b69d9f0b33fe9e2d2f140faea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIKHY2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a1f83d318fd41a3bbe88f0bdb33f6729ced562cbe9963b72428b37502b737e. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/FIBD22100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73c586c08c86b43946b13910134320c0b118dc3626fe6235eeaff9f9138c235. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FIJOG2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf038944cc9bc662f02a411d1dbda4d824814275ce3e99f9203400ae85eae07f. 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/FIJOG2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbe8f1be325113603ad441d625d2b96a23d200914d1fdab276cd9c136e9a8d7. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/FIJOG2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ad4f78e47451239b3f0806bc5479ea9d4d4c46f9367cc1c28cefd145eeed23. 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/FIJOG2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5213bd2aa9cab0c733efe6b5c71e9324b953f86716d6b2aa253564dcd23d63c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FIJOG2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9374c5630ac4e6ff17209af291f674dd4e8657169fa7abd47a52523c1636add6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FIJOG2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5acd7b8e660ac6efa418fc5129903926f94273b0cd2051db438b14e26b9c95. 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/FIJOG2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae4dd177ff88b0077e269f0dee0b28a5c922e16cb402c4ab5e4303d9320682. 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/FIJOG2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c993a12b2b3c5bf9b7ac8ffd6d06b2dfd32ec0815c5fafd8a83a0572b60ea8b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FIJOG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6897716880aac2798fb5b734af1c9c35156ebe3514481f64de38f986ada2271c. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/FIJOG2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168b87541478a95da00d4e221d2da7dcd3fab901ab7edad069895bad365068ae. 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/FIJOG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2677c971dda7bef3c67d5bf12a8d9b623dbc9229a34e77dde2003d878df99cea. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FIJOG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305b8a15e0e8347504771130c67a64d479d96bf9c6f3b4f963f86c06c919f22. 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/FIJOG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0709b73b87f5b5354a1082841b0cc74320d07d35ad727744a18bcfaa291ba1cf. 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/FIJOG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6ad365d954615710aa94e7c87d472c33aa6d9a922f6c90a39c0811354463b. 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/FIJOG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba862e8a9b151f4377e63da8d21a1f6bdb955de0e2459b4db04a77601f9e5c1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FIJOG2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dbc51a79584b094922a939dbfc30b220d77b04dea3c10e63008e138fbb8e5e. 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/FIJOG2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3c2f4f412df90d9f575325c674be1479ddc98ebb49d723cc8c0e3390c4c8ae. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/FIJOG2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee0282893d1bd2ed89fa34572cbfeaecafe1d4a4768d3e9f5c03babaa633ee. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FIJOG2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c6117d21963a6ed238a1abdefa0faa2371dbc93e8f17da58f50ccb110495b9. 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/BEN581500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e4b5ff83a068dc4a4951b59037c1bcc96f51d22fc16393b23956f0696a9433. 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/FIK3E2300118.