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 0xb39ad515116cc10c907742c5ef2cbbb9e3c301525226d5fcdda583c27bcefab2. 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/f69e6d8b-50fd-43ce-8d71-49fb210f2641.json and https://artists.proofprofile.net/proofs/artist/f69e6d8b-50fd-43ce-8d71-49fb210f2641.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 0xec1ab7e8857348476ae5cb0dc8f4891627c3641ef77d78117f2f3cb41593f5e8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USHM91677842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cce3061fe5b5573936ef9d828c4f9951ffe33f9a09185ab2979e5ef450b45. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:08Z), 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/USHM91677843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285d6233f1aaeb84784da670bfcea3ac72e1a6600cad06b7cde90c0415c8b082. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:04Z), 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/USHM91677844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974ed0ba40013d95e8ba76f21cf3f40f7f13173459577b794b2b4f8ae6619477. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:59:46Z), 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/USHM91677845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f757324ab3df633cf8d794f93b78849f7c83acbd3f45f205da391acc35bd628. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USHM91677846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb19a66f71ca0ce52a9e0d130f3aa37099e993be3f6c72ae9dedd68d422cb2b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM21910465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0d1663412e07315731f83115168e7daa7ba5e3fdd957b967c94e456fe68ef. 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/AUMTB2200251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e6dcbec8b5740c90c27c28fec6a6295fe84936f876afd88b4cd03158cee142. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/AUMTB2200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84f532b2b847611a872c7f5c39a790f8f4cdb6cb3efff97aeb263956a2cefa9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUMTB2200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e393762c78dc27d1173d452a4421ea950878bd0161a7978e1ecac80a580ef9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/AUMTB2200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91797a119c1fc7955960ef5ab9c0533bb873356474404370b60ee4968711af21. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUMTB2200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf131d733fa38b0065520c4c5ae3b6cf8427cc8ba2e668ecb70097b02709140b9. 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/USCGJ2175570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8cdb02bdb4d2b40540957bc7cbd5bfa584587a71439cc2935bd49fadb9f1d0. 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/AUMTB2200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f860d1a664919e60b86437d77ecef1e736db2e210b218068f5bcfb37302358. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX201723037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220ed129dff4256bb1efa501b2deb02ef72474263a84ec60706b267119341ad. 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/FRX201723038.