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 0x40317d615f71019f136ac397413fc2fe1062a4e1c0e1f72c92458cd55e63fc54. 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/faa07a0c-ee77-4b09-87ae-a0a40a9df6ce.json and https://artists.proofprofile.net/proofs/artist/faa07a0c-ee77-4b09-87ae-a0a40a9df6ce.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 0xe3de8bc5733658d6139ca50856400fa728a7d7776047404c79455c4947158170. 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/US6680916832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5365703727d5d13cd8d689d00848be463cee056c110d88385ddcaafcfd66bb. 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/US6680916833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cade2baf5d349fdccb3822f9fa91b933328091ed49e3e6570aefc52909d64d9. 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/US6680916834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a98d26cb9b9364e1da36a8cd3d15db95fc833b464fa1e7fbc84ce6b36e516fe. 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/US6680916835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea89b8ce1d42bc574a92c14816b9c3daea546607c7d660f0b034f75733dfb05. 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/US6680916836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1885a8e69fb62d8ffe5cae5550e9c0c5564fc0fcaac615e1c2e913e932c610eb. 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/US6680916837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79fa8ac00a142149ac3ad3ad8b5894b8a52cdd10a61d6357aaa04d4aeab18e5. 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/US6680916838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0efe304b68068e9fba8cdc4826657a332904cced6790bf4253d216d14ae5bc1. 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/US6680916839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05dfcff2e00e402a55ead6735d07302df04911fb6f0ea8318d40e3616e8334. 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/US6680916840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab6898f3f9fda5ff5393f4bf67e0f989eb09f4561805b3899357cd3622b41d1. 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/US6680916841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9950a5be4d870c3e3566b7e31d7b3b31c6f8650a359d8ea4071471f7bcafa. 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/US6680916842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b628c25ef5023ed1735039d491df78af14100cee6c1b4e9c1d6a2f3c370d32b. 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/US6680916689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea89b8ce1d42bc574a92c14816b9c3daea546607c7d660f0b034f75733dfb05. 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/US6680916836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a98d26cb9b9364e1da36a8cd3d15db95fc833b464fa1e7fbc84ce6b36e516fe. 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/US6680916835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b628c25ef5023ed1735039d491df78af14100cee6c1b4e9c1d6a2f3c370d32b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6680916689.