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 0xba7f6bdb8d9131bf78eaa02a2a8a5b1e32c078578235068eb95e9019bcd6ad87. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68dc0f3d-b136-4bac-b9c2-1fc73dbd7a54.json and https://artists.proofprofile.net/proofs/artist/68dc0f3d-b136-4bac-b9c2-1fc73dbd7a54.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 0xa8f5b3c50853b5571d9f7914a16167c8c3b88f40014e3aa1311921a4bd5e51e8. 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/TCAJF2557393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5307a3f0295a5be29cc116674fbbd664f4bec69f5498844f0cc510514415c57d. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCAJI2528531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80be5d16f0fe88f10973fd3f637f08811871365a7abab352633e962dd5ee2c88. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAJI2528534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f795f1187914f10e4a6df02d012e418b61480a90df6f59e04995713637501. 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/TCAJI2528539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518da351d4503d9013e3d68203ea94fdeae365959e097d232596d15bba5eeed9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJI2528542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a91047b794fa4c4665f989ffabb459b9c1ac2614992e0f9968d86f70b3b293. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCAJJ2545860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76588adb892b727f8c39efad56b37a942237bb252b6605174b19fd41d1176d4f. 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/TCAJJ2545869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba115d4729353a28ebfab47a46b1aaeef2533c731d8965f07b98c11e1bef7f80. 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/TCAJJ2545874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72557f79166213631d99dc015f985a779a48b5ef49ff85f0cc16e53f9ffc6706. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJS2537050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229e0134032f4694fa659cbf537243e473add0ac808d16ddbb20c67b14338d29. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJT2537056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce58d0151cfd809b105903b68cb06e59c19e30429265d1b574ac67a81fb2743f. 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/TCAJS2537057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f8e67bb7fa490050f0ef732d537d8cc054b63c7a7f4ccb39fd68382387caec. 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/TCAJS2537063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850c75036ec4602b7918652353fea737d2ee9b896cea8ab30a725992b438e9b9. 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/TCAKA2509017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125c2b9d64c7dfffa987807c83569ffd0aaa054df3ad536f912525f5b357f8d0. 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/TCAKA2509020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70da716fae64afb0e05c5bffef37a94384680fd4826d2f4cf087e24151cb8b50. 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/TCAKB2509023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548f3527136e66777aace8b82ca2be5221f7c15d099aea233282f68eb50c394c. 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/TCAKA2509026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd156b7cdb00d4c6d3d36532423e1c665f7ebd4839aaa7bbb1a7c7a95f2e41b44. 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/QT65Z2566630.