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 0x008a8735165e559f9b13137e0b83e1aef989442528fb5e31723eacb5b4126b6a. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09eb20af-dd07-4645-99b0-6bdc0fe43f6e.json and https://artists.proofprofile.net/proofs/artist/09eb20af-dd07-4645-99b0-6bdc0fe43f6e.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 0x5531498c3d721c70bf2ba2994bbbc864b3c08e6976e9dc159e73b2722853c446. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ72433526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e4aafdfd864fec765f5a1d0abaf2d68592ea6cd3c1481a52e90c8b4bf9e013. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ72433528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bfee1342eaec1f8e659deb66e0ac2ec313742d4ffd51713114273b50435a48. 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/QZFZ72433530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbbed158f30c96b6f6e3d0face19f7d5f1e2ce450645c3970344a3bcd3a987d. 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/QZES92457116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f389880c6af7429d682b07162510a22a8f6fdb6132a8a108fef5ff8c358b31. 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/QZES92457117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5162bf06666989be9cd681e3db357eb985d82ad9db6c7bb0dcbc58c0477607d. 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/QZES92457118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f97d61fd1c424a7ccb2a6851a9cbd38ae5546642ef8e876575219f4f8a183cb. 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/QZES92457119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1782226a6f461c7f5ba4c64c0a8b297a9c5f9b5630d78026ec9b14fc3a6ef9f7. 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/QZES92457120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327c6c0aa0d896b25892c514f4f7d332817c41d4bb61c8f18b449b57f994cd58. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZTAX2458516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5759814d1de86fa77e50791063030b662f774e6cb4a7f7e32b8c15761c61a362. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZHN92515708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4d9beb77d771101a1dafbcaf9f650a884c65432f94b478bc56c8dd77a94dc4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEP2568693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b596105db5e544aeee1b89790115cd8ca50a81b5abebcc8565e42040c1f0e8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEP2568694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8a7e2f662e1eddb98f838caab2032cda6cd810148b884e23e4a09668289b0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEP2568695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec86035f8c25da2bc6bd8a60c71b09cd12daa2530894d3c597db8628bc55d22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAX2567977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6ff57b630cae8de1049ddbc43ae9d945a1b54df44981257a75b9c99ff833de. 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/QZZ7Q2550113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d153447b444153e9eac82f01579a94355aaad32d16b62ff97cb377d78cb9d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD52024488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bf55864a2a18ed12e39f1943539b00755b335a610046d0374b5580b89fce43. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES72419293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5b39d022a42453c17b2c454ee24c991790ceef93a3476ba3d4b7b1a051e68. 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/QZHN42423546.