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 0xaea98339b637ebefd466e4f3924976c972982b599ee284d69656b59018118110. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94a6a3b2-091a-46f4-8c74-eeb0157fd595.json and https://artists.proofprofile.net/proofs/artist/94a6a3b2-091a-46f4-8c74-eeb0157fd595.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 0xd94e0b35c90471c87a8186593c36d537ddf3ec6bfb20ecc56832ffeef247204c. 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/FR4P80900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23f736dc708aa94b8ceeb3e6bdc891d964bef7f59ff02dcd7bfaa87d51cb3e5. 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/FR4P80900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34c3cf107c359fe8878c8ecffaefd4f7c6447b316ddf03df9b1db46256e0c28. 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/FR4P80900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7dc71cf49f17b29cafcffb7d082b3a6917a07785eca188fc9fc2c38611210b. 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/FR4P80900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed55a345045223221fe2e1fb6e82acaac057d473679167b6998fbbeec1d7e94f. 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/FR4P80900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bc87739e1246ec0d37d6f078d5d5eba6af749de65aad1875a1af55f76d860b. 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/FR4P80900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74670db653cf5e797cc8682fb5a2ed59c022025e989ba77b04d42f8e28414b54. 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/FR4P80900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc985464ea85adff0062e04842af2193f6afb2ca7f30f81292badf0e5a043df. 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/FR4P80900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f19e7aa537f5030df19d2655e127639a454396dd40df484cd6866641e29368. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR4P80900010.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3c641cca8b87d3095a1a86d9dc841587fbc116dd68acf5df6839d7392ff69b. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR4P80900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2303376c734d2e2ea8b2319f211226e64910b7c2fd365d477c676dffffb8e7ed. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR4P80900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029951176a48322924b2d6c2575df6d1b0bc122fe915f405abb59b939b53ae76. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR4P80900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531a7fd79418efb07b7573c21f5831ea6e60e3834b527c895c2e37f85c471d1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR4P80900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d4a000c3eb37850554ff9f3637ab95e22f25fd17ecf9cabc27534a7e627787. 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/FR4P80200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc354adb893c930f81cbb0e0605b44fd64c8aaaa1afe6329e204c0fc85559de0b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR4P80200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc781763e38d6a662774a842cd8f9098b7a89b0bee33d287041d719ead90a324c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR4P80200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e884b35d406e060dec92f7740de6aea37ab20602a30a9ed7680626120e17b3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR4P80200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ddd7c5f1c695f8a0a6c16669adb4211c98b668093c5e5481acd926cddb3740. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR4P80200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090b2a0b372e4784681113e69b1f0f167e4022035766060dbfd49c1e6007fff5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR4P80200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26be4ec29ca5dcfea41be6b3445e6931e7e271524aa94e69b4eb2afba4cf7aea. 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/FR4P80000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d07f5c0f37d62d5babae415b3682e673a9e76393e1115f79ad241c82b76db5. 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/FR4P80000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df4bb8f41ccb48d50c1eaf35438dc6093fa3f4749df0064ec8d56fb96aa648. 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/FR4P80000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6111c5d0deb547c0777b9fdd7bab4451268cdf40abe18519354f6aa052a234. 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/FR4P80000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b18d83025ff689f7c9fc878bcb1d8dc7ddce0ea0de700dc1e8da57c6b41f1ed. 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/FR4P80000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d148e0a298f4f6074f7bee8a23305656732da9de1d1184b4cc1f50c74b39a. 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/FR4P80000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057db3069c5316e5b39a7b367787d2e2761d7bc77be0965ee7f04c37e53f1d38. 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/FR4P80000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c7f95b7dda4b39b09c014182c207926392801cc53afaf6c19f0f71478dedd5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR4P80000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e18249b8b1c5cb07b64f25bb773c94ef5925f73b74749ea004cd1823644b5c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR4P80000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71a99585a5c12265ada3886acae5f2ae86ff4a29c349e5e6356c2d1d7918d42. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR4P80000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83872ad857bbcb6c58ae773c6ead0d4df6d3076f2827e355a9f01ba5acaf5ee6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR4P80000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d82a62c2e652c2b7a1a07f518efc8b70d87ef214b6f2db89372d54e72a60073. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR4P80000110.