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 0xde1bbd2127b9e68ff3f8998ed2c90e107eb22cd4282fe0575d0129aabc181452. 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/32ff88e9-873e-4d89-9395-7ed58aaf244f.json and https://artists.proofprofile.net/proofs/artist/32ff88e9-873e-4d89-9395-7ed58aaf244f.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 0xc263993d7c9129d76dad4fb9c088b63191a094d3b26792cef24352b59fdb6007. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:05:45Z), 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/USL4Q1891624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169870fb4a0a05451a730a67a8af42f1e93f33d4a6e74d75080b221e70ebad9d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4Q1891627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6de1841371f9adf5bc1bb74fbf1b6529a8016dbcd4536d0fd5d6613d9e3f9f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USL4Q1891628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcdd85515f399516d8739d0dbe1fd4fdc32485e81b5c07cd04c6cb0144b4515. 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/USL4Q1891630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd77af8ba0ac8725adc114389d493886c35774de3ee9b0acddbf8a307ad5902. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:24Z), 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/USL4Q1891631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13ddd4f8c76b5c77a28e61b7bba9e53d95ceeb18bd47aaf8190f00ecfbc8ee. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:30Z), 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/USL4Q1891632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0a5cd228b84871d77eddef6f6ef9a476fd61b6ddfc93d53ee1f675f0d9974e. 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/USL4Q1891633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb01fcf555cb93471c10a64606026a9147dde47ddfd091f4ecff1a935c0ffa. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:43Z), 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/USL4Q1891637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15afbf29b968f41dfc23dea880aca9451a3db914a4caeaa0a32011265dbe6af9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USL4Q1891638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9807495334aedceeb52ed7dee9fc13f0bd0cfce689b402b402d3da45378e605a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q1891639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669b649a3294bd60d708de7192dcfcb90685b88f54208d109ee5ddd4583c5fda. 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/USDY42031641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d87d54ed16b8a24d3ccc7d24686ac833b761dd8540572b7236bc95adeb6070. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USCGJ2057812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77201ab97021bb48e379b4531e269c26e2ec1f6f2b7f9436e6d9af02ea7eeb06. 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/USCGJ2057813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c6a359e0ef4fbe76f087d4c2c54bf9a918cffbd91e813630be2d7912288c83. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USCGJ2057814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd358e63627711f2304ecdf23b62e05b50e58469d265b0b78883f993534f4d73. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USCGJ2057816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8604f6f1adefc576c7dbb8bc3ca014fa38cd26a230e2f2aa3f575f46b1a94c9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USCGJ2057817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878bbdf2754b212a575013b0390b7aedb710bf1d59b30cc0a3f1437cb23b2346. 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/USCGJ2057819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f714a8f6d0c1df8639e36b5c7b072d6d3daf5853e19b69e715d36f192b1fc. 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/USCGJ2057820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16181a0357bd5963359591e5aa9bbd897c078b18726067c71f7795191a6ac6fd. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USHM22094102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe788ff3c431c5156a8540a6d9f2687ad6aeecf229418f7bc7c381b2ca24ebf5. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USX9P2062406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c184830b56e45c6cee71ce14e2693228f07706e84ae222cf5382da717760a55. 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/USHM92190024.