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 0x9e418a8714614c6649a9889f48f76cd97b34379b387979fa2bbebfca6cd1bfad. 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/6980b4fe-fd5c-43bf-ba43-f99a0f73ca52.json and https://artists.proofprofile.net/proofs/artist/6980b4fe-fd5c-43bf-ba43-f99a0f73ca52.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 0xa2baa507407b1f7d2192d4f6604ebd5ce85ff4e645c3ae615a114a326317715d. 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/GBUM72302373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5f9c4090b53278861d3d86ca423adb75cc986ab0405cae16735d19cd5990b5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBUM72302374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145de473bd3006a931a93fbacbe15b69ffe3df10da5de6dc3487a6ccb4275b5d. 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/GBUM72302375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128e221f40f681f4fa05251b19bf53e4fc1d55be31d1c3d27874919447137b3. 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/GBUM72302376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d1192e46863650dc51e9572f626d0131a33dee0c95f7702428f747f757058. 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/GBUM72302378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a43e979d2bb659044301f6febd683f13467ea06a1217157e65fae263026e2e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBUM72302379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2b644029798e67835dd902125a238b1ebb7ad94fb1e97952db44c51cc308f5. 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/GBUM72302380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edeae96d35b120aef19a8aa97cf4e3de8a1d53ca79d29da391107cad524feca. 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/GBUM72302381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5b1dabb6c375c730806dc4cf99e92ea4024be06d14ec816bb9df53319dfb2. 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/GBUM72302384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9b6a905176a1e2dbd4d490cbef3fba337994eda0c66492f017f2f5c45f0d1. 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/GBUM72302382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1742e81df5a3f557bdb27313ba0f02ea02cd09ac1045391f375a1ba31682387f. 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/GBUM72302383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5662cdc682984037b1eb469113fd70d1420b1fe4623c2232bce3348d69667eec. 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/GBUM72302385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f56d3fcf8cb5eedb69ca129f42793aa53f2a8119717e4dc9b3228068bf1d53. 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/GBUM72308111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efab394d3cbef62d64f856dfa8fd605b13d5b426151f087dc0a8cdb02e9cb53. 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/GBUM72308112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2b6c700bd255ddee00f22d61f5cf48af2656e791cd022130d0a9b33d306b56. 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/GBUM72308113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f56d3fcf8cb5eedb69ca129f42793aa53f2a8119717e4dc9b3228068bf1d53. 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/GBUM72308111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9b6a905176a1e2dbd4d490cbef3fba337994eda0c66492f017f2f5c45f0d1. 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/GBUM72302382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5b1dabb6c375c730806dc4cf99e92ea4024be06d14ec816bb9df53319dfb2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBUM72302384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d1192e46863650dc51e9572f626d0131a33dee0c95f7702428f747f757058. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBUM72302378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edeae96d35b120aef19a8aa97cf4e3de8a1d53ca79d29da391107cad524feca. 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/GBUM72302381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145de473bd3006a931a93fbacbe15b69ffe3df10da5de6dc3487a6ccb4275b5d. 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/GBUM72302375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5b1dabb6c375c730806dc4cf99e92ea4024be06d14ec816bb9df53319dfb2. 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/GBUM72302384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d1192e46863650dc51e9572f626d0131a33dee0c95f7702428f747f757058. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBUM72302378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d1192e46863650dc51e9572f626d0131a33dee0c95f7702428f747f757058. 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/GBUM72302378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edeae96d35b120aef19a8aa97cf4e3de8a1d53ca79d29da391107cad524feca. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBUM72302381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145de473bd3006a931a93fbacbe15b69ffe3df10da5de6dc3487a6ccb4275b5d. 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/GBUM72302375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edeae96d35b120aef19a8aa97cf4e3de8a1d53ca79d29da391107cad524feca. 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/GBUM72302381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145de473bd3006a931a93fbacbe15b69ffe3df10da5de6dc3487a6ccb4275b5d. 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/GBUM72302375.