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 0xf6b57cab11abf1e1301a8e99f8dfb47eb12b8b5cb5bbb0574074e0a947ab06a6. 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/5cfd3195-aabd-4aa4-8646-f937d810b4af.json and https://artists.proofprofile.net/proofs/artist/5cfd3195-aabd-4aa4-8646-f937d810b4af.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 0x693072735d9fe5305ff0326a03dac5947711b6f3d8cc737aa0f6486d74c2c5b3. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/IL1012000558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d1ad28a5a5ecc9265724f65da64a6192ccf83da5356fb95b4cd13d08d9f27. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/IL1012000559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a98aa656e83a190a786875f86aba942362c75cfbca68f1b67116af2256ff63. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/IL1012000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac908d25f49dbc8771c318f65c025565ba8145b3a93b5b495193951a5f8bda. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL1012000562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295096fa1914b7dafcefa1c23afb8dead84950986464ad75797719c8a0ff6f59. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:31:04Z), 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/IL1012000563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8704448b8eb9eb824530fc386288151c68ca9e138b714319dba9df152d85d22d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:22Z), 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/IL1012000565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6208b7f9d809193d985c96d8068278c62ff045a4c6688e230ac06ae482dbf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IL1012000566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc58882d71c9a587868f03a423bdaf8c92143c98d4ec8d184a9e8cf1a4ea7d0. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/IL1012000567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8459adce0f8877622256fc7c1b54547f4e42fb8b501d2112fa471e7e8aaac. 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/IL1012000568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737cd753e737f81ed672572dc7576ffeb5ada495349efcd8a1f8e8aa37025516. 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/IL1012000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb077d57cb0fb4e04ca677fb7e80dff7c3d286f0619bc4039c50f8dde008bd3e5. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/IL1012000571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44406497d1da691621ac91ec63de7ed77ad4d1fb05316f9f6e7ef0577779f7d9. 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/IL1012000572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8f6392efae77cc108953a3e25ae8803fefe605b0d85551160d043d7d0f8f4f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IL1012200928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccf6b8ed799cb197e3294dd3512f5c4f11dc0fb2dc6a34e401e4f73380d4c8c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/IL1012201626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd243323e5bfe62b40c50bd11e6684fecd2e9fc7efd7b45b97f9e92600001038. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/IL1012300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449ee29869242212feb5a6301802b94f6cb3d1ffe39bc86c9be4bb21ff157707. 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/IL1012300832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410cd4a1f3d21560d3deb7a64d524fab00880df19a0bb8f8fddbbde6643d72b4. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/IL1012301074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b9984cb37266806cac404b4e3aceaa8eb1139644d8e621aaa7cbf2924caaa4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IL1012401172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562939d4963656e64284995c8d5a20eacc6cfb2203eb6911941a04446b6b619b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IL1012500837.