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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ae5dbace442e91170ac51a8b5946e808bbaf2336b7db1c314a2db13c55bcc1. 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/0b2684e5-b0b9-4ee1-b9af-bce05bd57341.json and https://artists.proofprofile.net/proofs/artist/0b2684e5-b0b9-4ee1-b9af-bce05bd57341.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eb7fae51b8c38f03d920129a4bbbafbcfce4c34e85481d805542808a4ce752. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBKQU1777312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa64caffbf00a74afd7375b3ec0e6977b9f6a5eeb435ad855e255d73167391f5. 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/SE5751811323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbdcb4ecb2de061bbbf56c6ebc17cab611bbd9091dff6d155944756e6a87eaf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK461900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa2bdfd34e5a47e2ef3db292a7c4f2c0b6194e439109f97a6fda464d51eda06. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/GBEQT1900335.
Somewhere In America, I Am Just Like You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5c77382949f9486b0272f6c1476cfd0ad0152d9a0e487a1b5c4d76f0ac7446. 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/QZK462000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974e10026f3c23e5046ce593025e9c0f2cc1c29827cab1dbfa0a4f42788a3471. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SE6QE2133339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07b554d98b774a5313439d9c6496e67340842f6dbbcc6164b4475ee360d1e6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US83Z2133553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cab56ec2004ebab451c63ae687501aff4d3cf178d45e7c8d097d0b26a051550. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US83Z2133554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619bcf96d06cef9c9a1f6ee07f0cb68498ddb757a6bc067b579e533e0d0ae15b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6HN2431884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b25d18b3178c69dee943cd0ee4deb14c6675c44765c8d0da148df273b727d03. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SE6HN2431885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28f0407f8b259302090196f1b90d0dd8db270d72613db709431a3633738e379. 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/CAGOO2562524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07b554d98b774a5313439d9c6496e67340842f6dbbcc6164b4475ee360d1e6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US83Z2133553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654cbb8e7076768f6c2c27e7b94e93e34f491e2e2b581cf80457d3edc6b5bacf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US4DK0400987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef09f8a0008f4799a42f797a825420935768a418b676c0959d6282683a105e67. 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/USHL20718542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d0c6202709f0e6e24672c85614472dcbb6b76a5d040aa72501fe5d2a404bd3. 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/GBKQU2076302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7753e2a3718d349993e60c677bc7a07fe204c8645c5ebc9eb39ab18598b34f. 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/QMFMF2384682.