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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f267e60d3aebd47e1ac74eb1c320f6591a810138c3f9f52ca0261ef5754046a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9af24025-0247-4ffc-b6af-d6b3f388281c.json and https://artists.proofprofile.net/proofs/artist/9af24025-0247-4ffc-b6af-d6b3f388281c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Watching the Rainbow / Miss Frankenstein (Digital 45)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109a4d01bc2f05690941d1c4f9e79a83b180c545edc6f07e848c2d1acfdf1c49. 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/QM4TW2242202.
Prisons on Fire: George Jackson, Attica & Black Liberation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bbdf73e405d089c7145792810872d4871e500c71694bc4430315644c85821d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USXUZ1170002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295f23d06eced73ca5f623f742e02032c99c468a2f787a85ef187f5432cc9c1b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USXUZ1170003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ed176f9780cc6b9362a8f5eab024f210bb127a5b3634e89dba06a8babeac78. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USXUZ1170006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4861141dffab8b0cde819f1f973da0a322fa65609e63de2d58c03ba3ddadfb85. 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/USXUZ1170009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92476d1028a2e9342f492d8fe6a1905af4b202508d614be9ca5832a8b96005b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USXUZ1170010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f3cfb188de00ae1be0cffcd2cf0e71cefd7827031597750842c3fd5210180. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USXUZ1170017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846d63cbf9c2a2f29a9eadf92e2d4efba32754dc9196b703ca3fee0b13c0f297. 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/USMR51371601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac0e28a8c48dfc1cbeb4befdee73526e73e82dc584c078bc2086b149c3eb8db. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/USMR51371608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133b1f9c5483ed9f091da7ab5a3ac98bd1dace36a8b1f65ad4a4955e04c31bcd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBBHN0900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49d2ff05d8143a3f8ca923911ee6e1d9394d7753df3a8c19f9eb2cc334d578. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHV61900028.
3-F Blues (Find 'Em, Fool 'Em, Forget 'Em)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f6223da6eac51871fdb3e731cff794ebde78d942dc96ba6bec67e865beedf7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHV61900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726fb83e3bf29c742e95d4bd098306b7847d4d29ff48ad62f65b0fa13773300b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHV61900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c113b0d4070817fb563b1491218f66b8f58822826f175c822e5ca3f5a1ceb74. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHV61900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233327ac5244f38b7c6b63f54cab920c193c9582aa71ce8f3c9a45756db92f03. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHV62000207.