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 0x0da9c205c2c2a547f37d79c4a0ec0d3b374963303d914a48b534ac46f595a5a7. 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/490bd8ef-2910-455c-baf0-af5dfb808d06.json and https://artists.proofprofile.net/proofs/artist/490bd8ef-2910-455c-baf0-af5dfb808d06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Progressive Indie Vol. 1 by Enroute Records
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 0x997b79fec2b472360cfb4c2bb62bc520dcc8953ac5bf4fa7cc01fad1a90ceb8c. 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/NLS6Y1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccf82f5470f635c02f04138dc23c39fbd60f1ea61ca903035b8a0881a9de020. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLS6Y2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec65264111063b43b301f4b3b15506715f49fb6275e0137f71f792eefe5a0a3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NLS6Y1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ed7407e7e1594151602f61b51340b988475f3c6b4aeb2e81568fbba085a756. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NLS6Y1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff46fd3dcade6061419da2c0758972960be9386799c35f1cca4770331868f051. 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/NLS6Y1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c821105298e944967ff3842735190c2d3a499de1c015c065e3ed6d183c9cda8. 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/NLS6Y1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0b6895f50e83c71dbb65504a2ec715d701e4cf15b625766e859e517dffac63. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NLS6Y1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27cacee74e064dd188e7b876b281f84ec590c51751479c4cd54864f7abb6e31. 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/NLS6Y1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d29e5dd95a2e0b2360e639c8ab9effe7f7c617eb04ad62847578bc2d94e5f9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLS6Y1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d552c1737a26dd13afd06388ec4671c6c74baeb920c55af8386f637ded1474. 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/NLS6Y1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1fa1aafe12443d4e4145b5c1afedc6a3c230a61a59f5bcd74b517e28f4de70. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NLS6Y1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88f7b1eac5a6608c8dac6f2d599d23d8d6fd1e056c3157f1e2960d60c305b2. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/NLS6Y1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d90b7556793f7669081b6245251fe8bc40d8b13e00a01148d0478f697fc760. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/NLS6Y1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaf71609c8429205091b718e25bbc71f23b0ad584824f5ebae5479a2fbb7a34. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/NLS6Y1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c5079ee171b075543015e6b44d34c75f167afd89fe13083db7a28180e5b98. 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/NLS6Y2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7ba4847e11ee92c475a5e63c0d437f234d3b28f9c3f78607c42b8a373c975c. 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/NLS6Y2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7dff1095d6920d481cbe0bc87ec3a43aa29bbd7d73412bd615e4591e8d4e0e. 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/NLS6Y2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d33c2c63de2018826f3319bae2aa0653f11ec15f8b41b4179223832ba1845. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NLS6Y2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2395c90f6e13a02240dc2e653767ee141db7ee80db5a052ba575f780552be8b2. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/NLS6Y2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912d9e7922ef1fbe74188351db5cc56bab9b3d77227cdeaab8b4fa1f5791ff4c. 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/NLS6Y2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367c2d88ed5d7dc88f75f370a26257472be7372c5276f20d366f8fb864475d88. 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/NLS6Y2300095.