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 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 0x8a7448ee8fb4005ebd55ba34c4965a9f5cf022d38c8fd846d5b3f0f3a2f945b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/751f269d-68da-457c-8325-8ec397c71646.json and https://artists.proofprofile.net/proofs/artist/751f269d-68da-457c-8325-8ec397c71646.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 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 0x80c97b0a0fe12e334bcf34c5865a5df9a81a27c38693c8a079f4d26112b60412. 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/CA6D21900399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75150265d8f213a3545f976eab9759c6729b163bb312ac375c5c1eb48285384f. 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/CA6D22100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf45e1b75cdeaa17173c4bff6682565389410ec3187cac53e21d9e7cd8bae06. 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/CA6D22100474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4574665597a63aa5a2b6866bb921b02cac9d92d718d6fa56f1840844f29520. 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/CA6D22100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712272513b90efd31e899f9c2f0e4089580df06d08d97115c95b2188c67b3e91. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBEWA2202070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712272513b90efd31e899f9c2f0e4089580df06d08d97115c95b2188c67b3e91. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBEWA2202070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360dc30ed1bb19f2c90b8800b124c09779dba78bdb23e26f5a29d7c9a84c377e. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBEWA2202680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ee179295ac62de1595eaed64184ed6cc0eeff09769d0a69b701952b0ba0ac1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBEWA2202681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6326753a21dd43baf52b5bec4df3d30c1877c862daf7be69953133622ad8b65c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBEWA2202682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e278ba74e3099062a075ed0c7a830000903aeb77f313741efb40e53d7d3f11. 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/NLRD52257497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979366ce655f70017a6904f0104f12e33e7e394c40519eeb23c06aec1fb6a85e. 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/CA5KR2313269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c01077da4294dd57260ab33cffebcd4d283cc74e25ad2e15c617ef1b31c313. 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/CA6D22300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79908e6a87ba8ae98e6212bb06fe8376f001bbd81bf0c87016ceba57ea2fdb8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CA5KR2336654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9323af8def4e6c52841f9b79b4c558ef42ad0ea85155f83ef6c5d73afd20db8e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2336655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8d6e614e7ad3fdf4370aaed26a1bd61267835f5e7cbe2a5dc7e68cbf63a22d. 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/GBEWA2303820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd136e55f8e5f801cf2889fd8ffbf4d01eb738896fbc7dd7ccd78d7dafa02d93. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CA5KR2588336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a822c6529923c12361de681fef19b781bac35051fab9abe06cfa1876fefcaf7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2389991.
Insanity (feat. American Teeth) - Mazare Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e5c52f5bbc562918ec8b8cd8687206f7af359fa4b20ed217e89176f504c385. 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/USWB12305605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed5bbc1ad8065656f42322cb873b4d3a3460f98592a026f493496d266d842ee. 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/CA5KR2259309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1d6d0447b078bfa0a94b134b17b31737e2e99b6c36f8c8aa4b9eb5e3058cd. 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/USA2P1942698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff016fc50584fa40d9a3eeb67a125892d37e40c5ea29b9d6aa382e34173ee66. 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/CA6D21900099.
Only Now (feat. Tyler Graves) - Mazare Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9874b6c47b6d66f11f96a5cd48516d1f1f9b9c7cc50d1f4d9a79f04bf9a8913d. 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/GBEWA1906654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6045965f1d890b914c9b27c91e0162778fd171b3dc33fde26665bd1516949ad. 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/CA5KR2113992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6045965f1d890b914c9b27c91e0162778fd171b3dc33fde26665bd1516949ad. 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/CA5KR2113992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494818c9ab2e3d6f58095ebcf7b37a313471bc338760ebbeb137836cd4764af2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL2016574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0768f5aad177d8d6274692f32fdfbea3a0486037de372125f184727c955c7b68. 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/USA2P2126376.