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 0x79bd3c6e20202931d303aea0b8e719a260f6987188a3a7cb7d508731edefbc7f. 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/cd0876ec-630c-4bfe-80ad-75c96f7a1a05.json and https://artists.proofprofile.net/proofs/artist/cd0876ec-630c-4bfe-80ad-75c96f7a1a05.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 0xa7947cb369c198c363e8a820b8ed01f09ee63a9d900aac74a9a496a6d7f3ede3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PLC061705757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200f1fd19b4a7e82101518a32eb70726ac802d602fef944ba7b1e732c288f410. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:51Z), 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/PLC061706280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97727d206a6cca661dc35b9be6c35db7ecf84664c99fd103706cfa48dc4f9a64. 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/PLC061706281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccf6d0afd1a96fc721db26f3791b83c96d2cebef01845c4f8d90a3bb95e6cdf. 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/PLC061907951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663fa449f0d7b2481edcc76482c3c859207c90652dff6012440e5f3aa51e0adb. 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/PLC061907953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a46cded19461f76e023986ff47fa9788fc072d247c09302b305f6f704ebba16. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/PLC061907957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35c7796ea33c7a8f2edb8955ca8f6f7f1e9fec287b2e95935be2d5336cdf9ce. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PLC062010677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97217d802074b891e3f5be14d0b6bdde8dd3247fbac05faffa1fcaa21d46f483. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/PLC062112138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c03f934f53bcffbb41ed4b5a17883292bee95f0ce0f57886bbfe0c6afa6fca. 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/PLUM72200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd706d9d81d1e9fd0c48c20285a4da16ff929791c94f4a9368a18a58907ed8. 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/PLUM72200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463c03e461c9cab57f5061913d2492821dbc92c428d071daa5da857ef5d83c28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL2DY2301471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a853758ca436586933ad9ff933581f3296e6035917af41c223fc47127bb4ae1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC062009881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c03f934f53bcffbb41ed4b5a17883292bee95f0ce0f57886bbfe0c6afa6fca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLUM72200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463c03e461c9cab57f5061913d2492821dbc92c428d071daa5da857ef5d83c28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PL2DY2301471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab77b7950bd1cd40e03ba260cfe1ad37c98386cbeaec95f8cc35566726b5855. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PL2DY2300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f40171fa874ae4ccb2f612ba502457885ba78eb77d9e360ae5fe4a4bfde7a80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PL2DY2301474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf562a64101f2b73b1d55cfdc35c41d0baf6d36da210aec7eba5776fb76de07. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL2DY2301476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b9ab96fc40ccce5720ac34646bd5dcd9203200f5c445523d4e7090f0ddf0a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL2DY2301477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c95a4e25e1436ece0ee61c1d0e58be9d322096e9c08c31816fc6da7603e8d90. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/PLC062115616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefad94c497d2112f67f4951e02467c964b53daa3532b9c72b052f85a05f1cef3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL2DY2301480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd706d9d81d1e9fd0c48c20285a4da16ff929791c94f4a9368a18a58907ed8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLUM72200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3b626a6df2a0b518a4caed851372d69d09ba5dcad5b149d17e1dc4f589fe6b. 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/PL2DY2301481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd5bbb6a1962aee664922500c352068533666e40302db807d0264d651b2484b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLUM72200700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba24d1066d414d825fc0cfef6db7457908883c8e92e8b5d925253bce1e75b1c. 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/PLB382400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b99cbc1b39c63cf15300ffe060297f344cd3f1ae8d5cd1b85894becfcd661d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062115188.