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 0x7b58c9bf5e6e5a247ba6bb348ea972a8a7bf3159320dbb5aee34379d6c84534d. 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/78486233-393b-4d16-a35b-9392b25fe09c.json and https://artists.proofprofile.net/proofs/artist/78486233-393b-4d16-a35b-9392b25fe09c.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 0x7c8d63de11461ea11b784c08fdffea901288b6815ca10a34f8c99f5176f93440. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAZ2263912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016fe64950961bb5c2755e88c1a4488694fe24abccaab1f289f8e31c7ad53803. 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/QZES92391824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbe5ed995ed190157e5c71c00193a6681a1cad06ebd5cfec17506db233191b7. 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/QZTAZ2263911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea77fcca56b951048f37a1a373667caab2bad4a59b96acfd8a64edc5d7278bf. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAY2251592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdca3b977a740299d348c6f62f2caff360a226e85377dc52fa9bb1f163282c9. 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/QZTAZ2263914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8425a14b5db98a2bcd08e00acd15cbf9f87bd8d16771719cadc434710f3da17d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES92391825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd29a78a43381f7f35e181d3e0fb94b03c8015ad7933f0666f476586d8e81804. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAY2251591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae39d1699462109b103df6afb4ba05b71fac7393b54e0a31e9696f51addb1eb1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC2441867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1742b91db1886367419313a93defb8363f6b94d2cf726294423f3efb46657ab. 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/UKYT62400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f09c2e0b5f090cf4d895147fcff9ce121a3350d05ddf880ff099e1d6dc289. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKYT62400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f09c2e0b5f090cf4d895147fcff9ce121a3350d05ddf880ff099e1d6dc289. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/UKYT62400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5528e1a024673d15ffb4256eab03347cc748184e9b511ffd6c670f653c065b0d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:09:49Z), 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/UKYT62400279.