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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5190ba3f76d905821e01addc08f7dcf989bda090d291255b5f28341f064fb70a. 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/493ed8a7-0f18-4c78-8a02-37708579b874.json and https://artists.proofprofile.net/proofs/artist/493ed8a7-0f18-4c78-8a02-37708579b874.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e699dabf2ff0d6ae4359148371fdddc37bd4066d5783cf4f9b50fba50271f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDJ20200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3822da8003631bacb7af64686bc41024dd355156fbd149b3807fbde4641dff57. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDJ20200341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74475c948637597d10753be942ff605de0c1e996241f3711450b4f34afc3802. 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/USDJ20300747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fe80c1c212667266aaa720c4a8efc2dc4ee181d5f42497d0e1b954a19c9886. 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/USDJ20300738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbc4556078a3806b6ecd633843a36a5d68654a986e86af63235b36cbec474a2. 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/USDJ20300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c1a6efb921b304d0350457f2d27d9a27ca834216947cbfd3d36361aa6c5134. 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/USDJ20300749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eb0f1d2a0e4a51bb644a9b8712c7e6f32326d936565c731f762325b5b6f402. 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/USDJ20401092.
On Fire Tonight - Album Version (Edited)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0396825c14fc2d0a5c0a06465f367e2683c1bc21c6ec10512a5350c78b95086. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USDJ20200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8972eb1b68d6a48ca209685f60c2f38c07cfba38790a3f36fe46556b24b8171c. 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/USDJ20200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3822da8003631bacb7af64686bc41024dd355156fbd149b3807fbde4641dff57. 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/USDJ20200341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3822da8003631bacb7af64686bc41024dd355156fbd149b3807fbde4641dff57. 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/USDJ20200341.
The Ultimate Old School Hip-Hop Album Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e699dabf2ff0d6ae4359148371fdddc37bd4066d5783cf4f9b50fba50271f. 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/USDJ20200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7b566b7dcf28173424bf91af02ced5f9746f60c47f1b271e656146473470ca. 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/USDJ20200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683913058df07d098723d9affe3eb3de6f142cf036aef8fc8e2f622f206b1315. 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/USDJ20200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e699dabf2ff0d6ae4359148371fdddc37bd4066d5783cf4f9b50fba50271f. 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/USDJ20200342.