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 0x09492425e127743021ead14ba8fbfa7ffc2940d9e5d0f5eec0f973c91fe2ce8f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81ca7c0d-9f95-4615-bbba-8b3e09cac1b8.json and https://artists.proofprofile.net/proofs/artist/81ca7c0d-9f95-4615-bbba-8b3e09cac1b8.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 0x2f66c94181b33f124f570d5b672d0eefb3ac627072f05909afea2dfe48f84969. 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/QZDA72331115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc290a9050311d5098dcf7b5172cde40c5e949366db9e6d338223b626e3be706a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA72331117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca374dadd17a103d58d9d3ac257ef889f0b6d715fc653aa441b98981e774da4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA72331118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb256dea8250b76470bb63effd0d10efaa623fbb9da7f86bf00cfe913b161361. 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/QZDA62251467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c10d94e7323e5112a73f98b61863382a43c99b75528aff69e377f6be43c072f. 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/QZK6F2349254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd639bc28869188903b12bc0966788598da1d6c1aa76632475239b82fd7a15d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:55:22Z), 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/QZTBF2407714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721b72977247a383357376af8aee6c14d7b4dccee62c9b4cc44e1a2c352acacd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:27:29Z), 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/QZTBF2407717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a6f60a233478b0fb0f10309095196bfecb2206e56d5365e5b56e18a5c94993. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTBF2407721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f8e4ceb14750e5033f7240d13cd62f0c707f884aa991b639621c30d5905bf5. 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/QZTBF2407723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a3e9ae0c3b6373f855e9954286183f513f85dd58794d900d23c8f6053a71c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:13Z), 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/QZTBF2407730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de65a0f4ed5e8b0a5f2af5b11ac8ca720e77a932842802c5a25c87dac3cba9d. 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/QZTBF2407733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae1d70b292f0d31014fa3efd55c392176076f8408722f54697a5abc1d0669b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:21Z), 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/QZTBF2407735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d72b4bc2864cb186b6007abc1f642f095187c5b0084060bdbc8b58ef8fa474. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBF2407736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e3735ef83d18f1598f41437c36366f326057de1bd08f8dbfdc7718403f8720. 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/QZTBF2407737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6143fbf6cb89d24ae71610b300543fc4332845302101a05656b2a8c3073dbf88. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:22:43Z), 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/QZTBF2407739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af8ee534a44402604c230c147f858486acf9d7d77e89b4b75a82d553199d7ad. 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/QZFZ22501393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26e694940e1fe109c3a5c4b79051926c30163f357f1e814fe3c27d1d72459be. 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/QZTGW2406387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41739222b24ae127722fddb80e334dd9094b7aa8c1fa5234ec6c029ca7911bc8. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:17Z), 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/QZZ7P2546850.