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 0xd13967d53553f39c0355ab8aec744846a847a124e9c9d1b91a04e7d84c2dadc4. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e99c43f-8065-4461-8333-480456eadb99.json and https://artists.proofprofile.net/proofs/artist/1e99c43f-8065-4461-8333-480456eadb99.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 0xc2af0ca473c51fc050ea18711a34d929afd165f8b96f1072ef6f9873a216cf34. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHZ52102148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3222980561d929829f5455e4b23d7858b740be32bc46ce90f13113dbb1f6bf. 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/QZHZ52102150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec88390e514e680037b1048f17d6e162498f8fc91bdfd58dd5da4ce37b2d0751. 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/QZHZ52102151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a2fcc9e1befcc8985fcfc7fac222291726b41eedc9802cb89d170eb8ab3016. 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/QZHZ52102152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8967316ca3ba9b88357468c201d57d634f35d651259cc5f6dd55f5dcc528737. 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/QZHZ52102153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39c01c5afb328bacb9fa1a9b5e0be1c78749bc0c7befb5a6a2fd4dd2bd86047. 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/QZHZ52102155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03faedb09845ce2f6d604c4eee6287fe1ce7db9c82acf23a616cfdb8cbf5813. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHZ52102146.
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 0x40322e0b4054ea266d81147b518e4c39f843d3a710204e1cba546e42cb434591. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZHZ52102147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61e62382497131bfd1eb42fa8cf75fca1a1cfde9f2aad9f6e343ee8c1abaeb5. 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/QZHZ52102149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969ba0287f9537b4a444658aa1f2d1c01917b76a3a3d4c65769010c7be815d04. 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/QZHZ52102154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fff91f2543e1b4ff53f35c7d56d37c74c3c8f58ea354cdaa2f0ae7a69e8d0fb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHZ52102156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6463bfed04ac71b39ef43483bbd758c060508fe9538641621bf2a68ab008ab83. 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/US7VG1702852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246ca579a8073d81bfbf429c2d71c41ef79d30086611518786d7641676279655. 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/US7VG1702853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c0d6c81772a19b5bb5a32cf7e95b9753e4639531a70cbd91ba2b9695fac1e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG1702854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bdb2a78fdda24e4a861126c08ff1e82a1be4696a069fe74b8eda087fb87dd2. 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/US7VG1702855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522203850e9573326b5da8ab1a8f0af9e9a5d3bf41d052776633aa326d7ef8d6. 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/US7VG1702857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7881087966df50047c1f8524058909965b24f3ecce97b99a90959d38766df50. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US7VG1702848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ae56f4191d9781cf2ceb1ad7ac28b853367a7c3f4c5cf0ac3b6a2030a3e8ba. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US7VG1702850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa54c0d87776dc3c311df067034ce416ddf496f68974fc610c0e32975a082f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US7VG1702851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2573dee27fa77bfc16dd5b48fe18e7fcd06ecfcdad1baf8891784c7031cab913. 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/US7VG1702856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6eeb9260c38727204198ac2fa125e4b7820fbcfe62b07da71d63d5569ece4a. 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/QZ5AB1643323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45513609d58f02691b46610f6b4a7c02f42efdd13441f199a87716e221281047. 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/QZ5AB1643326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023b6820bc6c9ee729f51b12ede694e3d3f68eb6240a681d0599c4d6bd728802. 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/QZ5AB1643327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c753c0095e868f9448d2c7d98d247cbcfca9a4b3b0e901d7d43ccaa8f99d28. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1643330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372724fca4371988e7658d9d9d26815e9ca85c92214155259a37f768c5a886ed. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5AB1643324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b7c2b903e829b0b16cd44166026609fec4342e20e88a62131da321530f1f97. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ5AB1643325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6235434c2ae0816ed7ae9fe4a259eff88eff3b26c4b5eba8544a2a8665d5fdcf. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZ5AB1643328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f23183ba6a43223a2b1318ab9ecf081c5f9480954b77ba8199349d781740919. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZ5AB1643329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb12815158a785891cf01e4a619d3cddce2731ad97d96db84087c30c8b1e63ec. 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/QZ5AB1643331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c10d3d4d17c6f31175f9b55dc4f212ca83d6dfb11c5ab512f2c51916755d87. 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/US7VG1769657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e5e29048ac21d41173964bb8fa3f855088a7121d8a4f0bcfc7d8248b6e63c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US7VG1769656.