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 0xbd0ce5eee48ebb489f25ef2ac6554be49285ec12463bbbe439f2699ab82f18dd. 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/e852e02a-5bef-4fd2-8fff-5e78a586ae29.json and https://artists.proofprofile.net/proofs/artist/e852e02a-5bef-4fd2-8fff-5e78a586ae29.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 0x496f3a29881161f1404c3c5dcb83f5c461b25d136b16fcc1a14cb94e7c710da9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:56Z), 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/AUOAZ2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4816da28c2080bb3cfbafbf877dda46fe9d45ec7ecb954c1270131b6816cd5f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUOAZ2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1bc84cadd6accd4af67669ed4205b6e81066fb41ff605c0fa282f2af0e1bc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/AUOAZ2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf3541d00c4d05e43cce32794da142f4c07b3e5db9c9ff7af3dea0f00868cc9. 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/AUOAZ2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2168708aed0554f28811e159d3ca66264bef9431743e6b2abb83d665054d5a18. 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/QZK6K2043547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f905012a23c55c33c62034502fbe76831ed81c135e5ad78e3743b06cd8c82b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AUOAZ2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665eeb2401a1159289e368fe8f7f59589181d3787c5dfd5d132fa717a0eaf915. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/AUOAZ2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5584d8c9f3667b0f6a02cfa3e313ee8f47575480a05eeb6d525b45580842b902. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:32:57Z), 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/AUOAZ2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3009899de7777e89e9a08c746b8f6e6be65581d464c7e3f07e379e231e3990ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:04:54Z), 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/AUOAZ2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78ea05f2214087c4752e5bdccc8433031dd3b9a556a53119ce9f0ee1d59511a. 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/AUOAZ2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bdbc18fe2e9bcc528e02d0c3285c5400d6ca0c7ac2b5da3ac5522f6f2eac7b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUOAZ2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dc41a87eba49d5e081cefd7ab86e2c2c8017d3a97bd9a9d291db5a832e6981. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:59:51Z), 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/AUOAZ2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b8d169450fa515d302431ebe85e81baf0f923df8dd3cc09d6df0e438fda0b5. 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/AUOAZ2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94be2675a3f8d30592df3a4067d72ac90a2fd9d0b71c4e14a031876b7eb2bbe2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/AUOAZ2000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda547588ea934def869538243c2db24ae925d073c5573334db1d13c34519c556. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:29:17Z), 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/AUOAZ2000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5666028359dee2f40768dff81cb080d42acade684f9143dc33387285c8e8f4. 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/AUOAZ2000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828b4027a2bf291d66ce62119fff750d30a903d26f193143265a3900112797f3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:26Z), 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/AUOAZ2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365a1996a9e0a63ffd52762d0e152ffb47c574940e38724b8632b0b388828590. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:56Z), 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/AUOAZ2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa0cc9381335f9c0838de33b7ee1c4d407dadf1dbe9f334c9403f87d5050de8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUOAZ2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc5455f2e528943174d878943712f9835ee8fd3d27bee09efc01ca4de2ef595. 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/AUOAZ2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e4710e4bd6ac08029f4aaa4337c974a01e8ef7664da2b9556f476ff504ce77. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/AUOAZ2000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5755fa8d00570067b39b8cd9700f6f95d3f79b80ddffb7feb6bc0b194048b6f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/AUOAZ2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce463f21bedb8b156f0e92957151413c06d630b47d7496b9dddc2e24262843ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUOAZ2000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e45a7b871a3950ed7b752a6e97de9bc8be49a8f3b9637848c5751563a8e7e8b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUOAZ2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c66b31f585081c1b82e7a9bfa0176c4eb3d643b9c883df8f6daee3850614755. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/AUOAZ2000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fcf5ea039ba69a0930dc8b5e7e48238cc0e17a7b561df834f53ae3d66d42e8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR2245674.