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 0x0faf5cb467785d3878141d49ea9b7b9a3dcc4ebbc3dc0c516ddc3689b4390f53. 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/68b7f452-d548-4b8f-89e6-e3060be820b2.json and https://artists.proofprofile.net/proofs/artist/68b7f452-d548-4b8f-89e6-e3060be820b2.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 0x837094541ebe0ec29bcd29a58904c31e9621af6a4a57cb21b2bf2658b6e760f0. 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/DEAR42480789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb594dd5644c52c2107c5fd041c3d206fc036e051e47858bef4c5697a16c1f56. 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/DEAR42480433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b57f494ccf458301f3ba592265300b4451b7f8de1f1e025dd3b4213c4e4f9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GB8KE2405897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e57e3883e5042a28470fea5adad364b74cccf427d0e7e13ff054282901ade0b. 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/GB8KE2405898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbb36096715ba66e88e8a908205424a8b849680bbab09dad822a3cb2ff9220f. 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/QZWFL2341844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770b1722f944ee74a336761c557b2194116f891ae05599616a1071143127a523. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFK2347965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413d1dc0b3c6030823f2fbd6fbdb94b453c11b86a7b1468adda66b6bdadf1500. 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/GB8KE2310517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3a408f095cf71852f938fcd01aa3a40c387b6a97fea9c2ec778f261d290286. 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/GB8KE2310434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b64a7d84c9f5f9310cc259b3dd18089390615dfb2a7a98a3a5283285fbe116. 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/GB8KE2310435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622bd2e43ece02d718c2caab3fb1b658a85838e7e0cf3ca1bafffd245f156479. 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/QZES72366740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2481f36736a50659b3021b859d95bf8b631165c6cddde6b6f8542c30e8d03a97. 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/GB8KE2214826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2613e0f1a93ec3885c336201b6f05bead692373bd4f24be6426d2dbb6a21a1d. 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/GB8KE2214827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f63a29819f55abe942020c2918c21d4ac38ad16e8db0003c668e154f247e70. 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/GB8KE2214828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf692f995545bf1cb4430f0fd9b5f028c56c7bd423426fc5e159604a831393. 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/GB8KE2163286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896355a4cfb23d1c2d486461b037c5bb2287e0a835fc12e0ca8f999172f3d087. 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/DEH742162046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5214a3b911c81ba666bb0357ee517dfa309b61301b0e60d0f785bfa2e9e78756. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEYOK2120295.