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 0x6f74ada362f3c5f9bbc8e155921ef4dd89a9974bdc1554fc0faa33b57ee801d9. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a6ac80e-2a0f-46d6-8b87-8b059d4eb016.json and https://artists.proofprofile.net/proofs/artist/4a6ac80e-2a0f-46d6-8b87-8b059d4eb016.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 0x388d29c67ffb82a9657dacf02ae714e8d2d19a1272849b0b036a5a7142f9f5a9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKEFA2301702.
Søren Lee Diversity Trio (Live in Copenhagen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6770e784ab47c5bb80ac99cc1a4814d4bdec9aca61287792d47956a6de8c43. 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/DKM222100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f1a3fd9ddc2ed54c2edf075a91610f394dd2bd2f01795faddcad17fc40df7b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12217523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551f9398a163158c6b470d1cf93f134e4f1b188be5683cc7d09ae1f31057e022. 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/FR9W12222872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc69ceb69920d7f124330421a9f953b32c6eec270e50e9b2e00a235814a0c6e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR9W12217522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f1a3fd9ddc2ed54c2edf075a91610f394dd2bd2f01795faddcad17fc40df7b. 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/FR9W12217523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd812b9230b9a9284289d6438f054fea9513beeba36c658b60d6afb722c1083d9. 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/DKZT91900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548364a393d4edd08227f71b1dbfb8d68d81dd5eafe875012622c9ee5d06b6bb. 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/DKZT91900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2c1f91c2dd5f2d2456254b2cd9a5855080710a5f852bb3b6146444115327f3. 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/DKZT91900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407491aedee69c869ddc3c69002eba09917b33fd33b8590284bd52d0b4164c91. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKZT91900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6945d11a7bb506f2c884924a496230b38f59ee68bcc46b780a44fb10049843e. 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/DKZT91900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd509045ef7d7def58b46de54a7913f676d8061270ad81438520f8d9f62226. 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/DKZT91900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cb3c0ea66e0e95799ffc8964602643f99ecb3fe393ee8522428ea7ade28976. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DKZT91900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2990c2597195cdefdbd6eafc1ad90c71d7aa2d8e02937fcf5914b0d8bf4466d1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKZT91900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddddadbb514f7ba7ba4a6048a7ba273197c313b985cdc7c9b1187e35d6e3e78a. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DKZT91900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f9f24bb24b95f6f8559d0d064c73b30cff891a4a40b921b420b58974fd6286. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DKZT91900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2341bb74708ecfc3f4426dfd6e34be0576975c7ffc76760c07975e9cf2647e5a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEWT22100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62589c4c6c9c8f04638090df4033ad52b9f658e716552c1df3da12a2aacf68d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEWT22100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb65ebac50fcf705304bc99e688ef43fed9c705ecdfbd67544d272069529175. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEWT22100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46a0b8de529c9b5bbb5523d1d0e7264a2bb0a359f3dff0f60a277f171c114cf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKH7B1500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2334d9562839f5e888de580640aee03757dbe550739b253a12bc6be8e043e2d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKH7B1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee017b56573b2f2aba79a5bc5d2e4d6e6d2e63ca4d5e22066f93f6d79fdbd42. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DKH7B1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b99b97ff952b1cd2c4e854a2fca4b4061401ab74730b6ec9564cad002e0477. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKH7B1600101.