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 0x10434a927eb72b9fe23943e50deef8a360f5c94330dfc6dc02ad633e85b92df7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49e32f4e-bce6-4636-afad-0b9a71ab5166.json and https://artists.proofprofile.net/proofs/artist/49e32f4e-bce6-4636-afad-0b9a71ab5166.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 0x32bd2906fd45ba1c4e5ccacd63d7738b6d9d4681a19554a491d284c71032f300. 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/GBLFP1764333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49b3fb9721b77cd9636b41266fd1b347c4ab8562439a9f784e0e044686477a7. 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/US83Z1911859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4042df9029d26574a5dfcae7fa30684f65c029215ed9ba455e6f8a2e24c94f7e. 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/US83Z1911860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc995c418861ff9d1b0bc6a7f2dbea995c55eac3ece589691f8f82c032f9caa52. 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/US83Z1911861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72f5d2e0624f42c5bad35bf19656d326288da12ff8d9a474c90486af99b9810. 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/US83Z1911862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb73873663b4e2c7a8235be3e7d319c41f04edb9e606033a5a910f42419c7a2. 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/DEH742036128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f54298db12792a096111c4c0b364309772c8921218e0c32743fe86899bb09f9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US83Z2146960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e756163471739a97baede2c249d6a921cc118df91cc1530224f9453f8c7821. 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/US83Z2351345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ea4d2e32b848297f86eb6a7e3594cdc93f118cfef81b2defb597f7de59a4a7. 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/US83Z1935153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f254be72e4e73c34cbcb07f68b7e44b06d5d70c98b1bf13e4c328aa13fde2d7. 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/GBKQU2032629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b09a75f0c93a5aafbaa4f7b6e17dd7313b3f2985a86c997ea1b8730e55df38. 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/US83Z2006245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dda9a92316d9eda14937c7bb2153957a160186a73f8657ed0978b6c7bbb3f50. 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/US83Z2102719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3fbf079f6ccd404045819d5444e6a558659723c9103d940ce33038942d5d2e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2019454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb754526b78ab5417fc4b3668706ebd6033e540947371c2597cedc75ab025f2de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z1796985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b008d3c0926be67e12a53ac5b55c62caa058a9e226873de96b29b11f30c7c3. 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/US83Z2145870.