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 0xc91b8d69eb9c4a1f22ffc88940afcb93142ab0755ed05a7978ceeb3fce1b211d. 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/7b69e83c-2ee4-4f11-b9f7-e6ff5776727b.json and https://artists.proofprofile.net/proofs/artist/7b69e83c-2ee4-4f11-b9f7-e6ff5776727b.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 0xe82543231c7e5a09433f40c78a71c88e0318a7ab9790d506df1ea07fda98dccc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/EECS11400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed15f3315c045f41a9578056a103443f26a59b28a81924d9b044e8c47ded76e4. 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/EECS11400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6489c7eec6fbfba20beb4b769e59515f28601ac6af06aad6849895e888243757. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:48Z), 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/EECS11400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f4229015cbdfb8b07df4484dba86a5380379062ded030356aec191d46a483d. 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/EECS10700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04dcc6fcdd166cf44f6a64594f647c01e8b436ef6f44913e3f5fec58681957d. 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/EECS10700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32edb4160bd3e35c453cc79f56ebb1de59cee7aca9e6e52b7f0173cafa01b40f. 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/EECS10700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7807d97f4a857b72cc5764eed639654a5afa9e7255a7608c0b169e7a425362a. 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/EECS10700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7780da4058eee6093f7cd9963bf03192639be7feb98785b6c4f2bff367066662. 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/EEGF10900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5444c1c01ad517bb71b82cb51bf0ba6b7623119316222670cfe45d76dbbefb31. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/EEGF10900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64bc66805a6a53f92ea788d026bc2c22d332698845725adc2aaad861c613e64. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:12:20Z), 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/EEGF10900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51917a6f1ffbdf102aabf13e6bc51e8b4ca677d9cd1fbd492d19079e2a9773. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHA2395466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc20d832aef14a50764d45efe9ba84dca63d27d9c1fc8135a2f4fd74e8d3d2d8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHA2395479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4af6c29172678cbb2287354e962e85cd404419bbc4cbd3f4bc367ef37e8035. 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/EEGF11400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa428e606e4b9ecbe8721d2c9e6657d4b651762fa6b9a4baa9892f72f69716b6b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/EEGF11500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada27c1f96d21c9999a869c857e77bd573df1faaa45ca5140adc768a9d94d444. 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/EEGF11600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e7f9053f2dece2fa7b8648f5b2c689b3b0d502097222bfaac75f6b132a6c4. 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/EEGF12000002.