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 0x939e83db12e8b17c905a008eac363d58d34bb1c2db107f99ff2eac2d0e9a410b. 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/1d4562a3-4c6b-48e2-b5e7-aae8b2b41765.json and https://artists.proofprofile.net/proofs/artist/1d4562a3-4c6b-48e2-b5e7-aae8b2b41765.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 0xe0b2561f9dab6eb4c5deec09452770b56e8faceed7bff5a00e6fab4cf97d6a4d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLG661200482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37771ac8c3dcdf48dbc22d4f43b7571db2d7ba6d2d2f403f2b5eb82854a0d479. 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/NLG661300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02697a0622ca3134ac1fa0a33429854a203b4f9ec8434d76d5ab74e43bc002. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLG661300177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f67f3228b1904b5f5a7396e9f67e079e25d5b140d6b5fde7fabf9f15e83336. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLG661300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79eaca39a81c2bbdcf0ed7c2331bcf57b4722b9a817652be94f706f788de47d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NL3BZ2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb9c89ea6efe11236568e0d1590073e99876c3c267d0c0b5fab06aa8b0460f9. 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/NL3BZ2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba9cd193acd0fdb532d6ce0f0c9cf95c956a8f5442b6eada5d4e22fe4b57d72. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NL3BZ2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb7be7e834ec7d8229ace22fa357ee3e0f6d0c68f79f852b50ed647536c1dff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL3BZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544febe84dcb55906b68d2101c04a8b921364f639a5b1ae6253794f0a583a8b7. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/NL3BZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe064248ee9ad27098bf27df27a92dbc68036b2282c8955bf4bf39db01d16a11a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:29Z), 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/NL3BZ2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee15e030d48cc0cbb20d8115f0c35146ae161e4254388955d11403d0ba333fb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:03:04Z), 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/NL3BZ2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb46a68518fffdacad679333adbddfde462219f6ac52fcafa90aa2b8914c6c8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NL3BZ2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb7be7e834ec7d8229ace22fa357ee3e0f6d0c68f79f852b50ed647536c1dff. 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/NL3BZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652d42f88bb5d902ce75ec87bcb69c69fce70bce7af583f5e82523db0af1366f. 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/NL3BZ2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a259d850e82f8d341d02a698eff1afc81f080be0afdb40753380d340b76c48. 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/NL3BZ2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb50d7cf0aea6606b607def3a60051a94ea9da56c56a7cb5b4a32bfb3ca57cb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NL3BZ2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08beb1191446fabb514586ba8c209914b4fdfb52035a172d9f62a4af06faf6b9. 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/NLS241900539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362c8638fccf183e3b2717dd5267a5fbfec22376570d109976c07b11e722dff. 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/NLG661500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dadf312b19b62142aaba586806535348cc417e2037a8993aad232d7c65effbf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLG661400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dadf312b19b62142aaba586806535348cc417e2037a8993aad232d7c65effbf. 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/NLG661400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d4e95b64c1ecc23c48f7163db49765a6b6780ffae2cc5e028e8b0e83d2086d. 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/QZTB92380531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61009a3c584f222596d228f402c47d40b24fd6774619f49aec9951174303cefe. 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/NLG661700526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb559e7a3ebcface60f8892ec9e6c66d24117b05fd08b5c5ca034003dbd7ceb5. 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/NLP762000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1e124f8743314d2bfddf00b6c02d8ec6322f1948ddff64775f9a99b79b1b23. 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/NLG661100490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563059cd02d0f8f42f4328c4acf98e0794c702d889d3cc8b37502ceb2db143db. 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/NLG661700292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b820bde27910d4b9cf502db73a5b472dd2b5db318807bfdd1838345bb8c508. 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/NLB601400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1c5ed5db2652d90cf60c9a57a4328f16f5e5a245829f44d454a5f15f4fdf6. 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/NLK072300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe898a52a24e79b320445c87d88a103b3df451d8deade626511c9d5733af60c. 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/BEB682300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd89bccfade07a71f7f470a5524916c0ca6b43c8791398dff148402788b25942. 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/NLMN21500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2704c0f073cdf62bcc4c82ab25a243c7cb790e1a70de99d16faef5fccd85f4e. 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/NLMN21600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158856254b4e25e690295d579a7922e0f376194bd597026189f1a32c7d4a9f25. 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/TCADM1878070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0235f1832cbbc8835b8eca6e8e8ca3d80cb749eaab595efeda7a239671ba2. 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/NLR1T2000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0235f1832cbbc8835b8eca6e8e8ca3d80cb749eaab595efeda7a239671ba2. 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/NLR1T2000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2f0cf041432336e19c885c7fba65bbbab645442baf5a4eb888a18af871fe0e. 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/NLZ7T1900009.