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 0x69759f3873393507ed3e6898aeb4ab87bedff58873baec4bde6887e6a0ac026f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4addce46-42d8-4640-933e-1d669d4a4cc9.json and https://artists.proofprofile.net/proofs/artist/4addce46-42d8-4640-933e-1d669d4a4cc9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54449ab6db36282666a078da75852a7c292898d579242cc8ff5ffc0811337498. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWQ2141850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ad9bedf39287fa04e493bed2b2c8e3c5bf8626af30e85295dbd44622fcfe4. 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/QZNWV2182302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd186d0d4cd85eb879f4919aaf42eab089560694fc7e0d1ce03e3dba978978d20. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:08Z), 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/QZNWY2105137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3362371211c735a9a9493d0fe02316475746223f54db87fb7e92ebd2e9b0e0. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZK6M2229456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5df4c2129ea94c30fed0ef1099975ac94a82d6578ff0f4d25f70a9080df85f. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZK6M2229459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a13ebb8fc60c1c6b8dec078d1666c18faf353dfb37fc9c5133603dc95a8c58d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB82263154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3349ed2b63fdb2f2455e8477dab157e07822a985fbd599e4112d663f3ce85e38. 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/QZTB82263155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfada964996ce986a05c9ef3c4e4c1871ac96d7da517c6684179780290fb1ece2. 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/QZTB82263156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52d10aa8f86a2954e3269179125d4de071c675d332e3af02788914a430142d8. 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/QZTB82263157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b6c5f537a9b3b56fd2bd841150831537144dce26184c75871ee0eebb21dc07. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB82263158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fe967d1c18cef2985ac1c51b8952d12db892a3192f63e6501baa884da6c681. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB82263159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbce37062158233e0c96dae137718b5e1bb8f1a8492fef10c19f9c61b921016b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEP2331831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c506a64577b7a4a2cd2b6992cc94bec2c561d8e8aa47f85fb965a532c5c6ca. 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/QZNWX2397243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03b98e9aeef0b35640f27af0e04922be20a6a7fa471edbd115df5151caa1cc6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWX2397245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c70db1cd70c31694b676a8bc9a80ff3f36ed8d1466c832e04a6fd0e5ac6a25. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:33:57Z), 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/QZMEQ2433998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10633c72ab9161ef244d96e553952a4257d38af27e07e486385158442f00b4e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWX2397246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f398faf6220bcc0eb6b0915683c84c93342e4602209695c75b91dfca5229b6. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZNWS2341153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54040f7abbf89555ddf343f81bd7a0d2da72de068c1513ddd67faed6ece557. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWX2397247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48b873afbcc699178ba3730be7e76f68ba023389232f80d7b945301a020271f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWX2397248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116024a92bfac2ef6e4370e4bbae0ab5b821886f83f5af55c91963452ba786dd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:26:04Z), 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/QZNWX2397249.