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 0x421e14545756bb17a6e413f93865ff76f9b04dd87ad0b94345e78fdf20856f37. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58af5289-df2d-4b77-b001-6e9325d68a9c.json and https://artists.proofprofile.net/proofs/artist/58af5289-df2d-4b77-b001-6e9325d68a9c.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 0x9c63b2a688f59852d1871ae390fe6f7168238a494dd4b05a2bd13c3d286eeea1. 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/US3DF2089522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc54795498b136c87d93525ea86b2616cfa997400cbaa1046946d8902e19b30. 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/US3DF2089525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677c34a81e6eaf1a2b91312c4d279d10b3221094f5c967f27ebb4d2cc935a9aa. 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/US3DF2089526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca126c134f07aea75a7370c2072f4b464d85624e9603ce78b19907c1ef1f7805. 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/US3DF2089527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05154ff00d8062b03763b780eea64b2bcccf8a016f7287ab47c7859058ab55. 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/US3DF2089530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353965f6f24b46998c5c7c2bd26d733a08a1edc8dc6333a145f03bd4d530fbef. 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/US3DF2089531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05154ff00d8062b03763b780eea64b2bcccf8a016f7287ab47c7859058ab55. 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/US3DF2089530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08792affce572e3ccab720a6b94aeda6ea986fb74f66b975b35db3c911d53d53. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1811349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda85484d571999540660ef5e02c81fa03acf3c95a0863173c032231e5730fe6b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCADI1785626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3f006fb9d00845a804f7aa783da02a16e16cdcd6ee0bc3b9082bda02fdd770. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCADI1785627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299aeb0b797f6fcee855d43955e99e00f450541a38642fc3c650d056bdc61e4f. 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/TCADI1785622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73961bcc5682036f1aa9dc9058783a2db6c7f84bf8594948488910eec126cc0a. 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/TCADI1785617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c432f5c35200d046e390e3762ad6c3817f2ecd1cbb1067cc3962f2afcb430. 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/TCADI1785625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c05126b7628397c3840af88ab04a9e8e8ea6dd2358eac868cd1120f3a7b8b63. 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/QM42K1955270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e8223f871f462f7965c39164bfda3e68d402732caff4d7218dad08eaac455. 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/QM42K1884519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01f76316a718154265ef13a37d9bbca96e88aab4884450cda49d961f241c627. 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/QM42K1887491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cca05f99c339886c3939194b04e024e41e973df1351cf176e09400f1429e2c. 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/QM42K1854269.