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 0xb1a5280453bb36d6f93e1ba8ee216b0aa57ce1d20387d98b5fb4696c6cd83871. 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/da0ceccb-0983-4f01-a7ee-f15ef478b0e3.json and https://artists.proofprofile.net/proofs/artist/da0ceccb-0983-4f01-a7ee-f15ef478b0e3.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 0xc51b4f34f3ba7be3949ec72cd8ff157fdc580ebf73ac36d8f2828549bb864b2d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ42255111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34a28736b9f3dc999da629eddaa037c22c2c638f11bd902febfd6b2853be54. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:26:17Z), 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/QZW9K2340283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd6b625ac1f50a0bf385749cec6cec94c2da6a99bc18518607289cb85754108. 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/QZW9L2354038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34a28736b9f3dc999da629eddaa037c22c2c638f11bd902febfd6b2853be54. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZW9K2340283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28995185a18b59c6ee0a6ab8f8b62807b27d59aa4b345acb2eaad6aace45a86. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZGLM2478780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf272238adca51f1342b6f03c0e46c8487a46e8260eb0805903329c17ab82b9fc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNJZ2342384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdaada35e14a69fc84f824674fbc94e0eb92e7ce6b9218fc35bb9f5ed4eca78. 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/QZGLS2472104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c1ff65931dadf82423a180bd58440f05b0a760206f3ddf708574f2a84e6be7. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNJY2415549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a8f0d26b4e33b9b178631ce2ac6aa544706105f315209ca416d83a07b4107a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:15Z), 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/QZNJZ2468305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20d44f520b167a2d6088385f6e124ac7377508a8f275165ed60834850fa412d. 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/QZW9K2431291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c1ff65931dadf82423a180bd58440f05b0a760206f3ddf708574f2a84e6be7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJY2415549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdaada35e14a69fc84f824674fbc94e0eb92e7ce6b9218fc35bb9f5ed4eca78. 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/QZGLS2472104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ec756aa5f73d0f4a5f51e058fef95ec9704d4a6c50a126ab05b29855edf8d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZGLS2584712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1935d60c5c28f6fd893b13288ad0effd6d4a435653610ec5bb4d59acf606cad. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNJW2505674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1258b7b12f4b0de1b37b5fa4091fa85677ad4b1b839b73472ad1cef261e8f6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJW2505675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eaab7a7b87383eadfca742efc663b038e300cbcc2a40305b464a62833436be. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJW2505676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a7c6fd6b8b74c64e5edfcb4ec9833f778dd8066929662c0d08758ac7e45ad2. 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/QZNJX2550056.