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 0xea39849050213dec8b2e2c65b673c62d58752db3e7dab1fd59f66d796c915a92. 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/e87813c4-1959-49de-8ff2-7defc8ec26ce.json and https://artists.proofprofile.net/proofs/artist/e87813c4-1959-49de-8ff2-7defc8ec26ce.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 0x23d70222d8a8dfa203680520597a190edc0cc8f6385f934e9d6920519fbc3709. 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/HKG732429483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf338cf5b719e13fd8548bdea6717d4373d1c6bf6f041174284daff7fd335446d. 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/HKG732411424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce52f53c75c02418bded916825f8427474f580b21142de22bf2c90a9c79a5c. 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/HKG732447273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a98aa5e64fa59e450193791f29d742101360286adc19534f3d2f87c7fa59fc0. 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/HKG731610400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d464897558b0ff181a911c4468bb6028d9e78e97c53f7a633db214499037a4. 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/HKG732359697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e2ddc6754afad55259fa5e35f68eb98138eea400da524ed79b01b76b67344. 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/HKG732341613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09218312d496844d2d86cce1b367ff1fff7a4e19a281a55eb5c9661647c692fd. 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/HKG732311823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ab39ced1e8e88698c8d07bfecb98a0c5bee9f7999de53996a2d977b21154a0. 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/HKG732312852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad24758954204fe24a7ec7fa904d98f94f0661acd954defe7fc291ab6b817cd. 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/HKE022380001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edf3f5412a8e77ed99f6bedffdf81719244b630528b2c9e10994929be7bc835. 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/HKE022380004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe12107cf5ece066f55cda3e0d36d4998f5f4592e7b8d29d548949bc6ffaf23. 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/HKE022380006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9068e5b00cd0b7189e428c5d67b0698f774013b16e3852a3440330f2c7ebb7e4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKE022380009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269798faba8ea6c790aaa5aab2236828bfcaaa32741fe157e69370aabfd2c5ef. 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/HKE022380012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d943fc7ecabc86900c01009fc0563e2de5d4b892b0a4385f086f66ebc0ac2bd. 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/HKE022380013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7b074ecacedaca4569cad8303bf806f635efeade5f0a1b6c06bcdb7e66f76f. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/HKE022380011.
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 0x5e0ca4d0c9bc634873f38835f8a3c4287b859ca196d2bff054db420cf9c1bddd. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZJPM2488473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3d9f9004ae135c7ca798fc117e1157e85df9039bdd8d76bbd01aa7bbab36ff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZJPM2488475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44836ea0f8463c0634fe1c20c70d0999aece50a5fa91dae83c6f45113005486d. 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/QZJPM2488483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fd2bc06a4842a54737e4a236fabdc107f702d96ce6c31baba9ce57e7204402. 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/QZJPM2488476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb990847f0c5d9ad10f37254a3bb82c5b479f4d45b8d43c8e19744dfaac99e77. 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/QZJPM2488479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076bead9bbc97aab77659de1f16f72cbf9d3c437a1183253ccc9d38a4189d55a. 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/QZJPM2488478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09f90838ef204c918d971c1b74440434445a327eb8dd9c139c346cafcad3165. 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/QZJPM2488480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac11df5fac22715d1af40640043ec5f71ac7a6e0e04c7a0e77d713d3d274cc5. 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/HKG732499215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef07d0a53f4c35bdeb2e6c2669720c5bd3870d360116305b7a0f6f244965d49b. 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/QT3T42421617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f10c4da100ab587f4d08c9abfd731e55fedae5482a3855149f1bb581c5d9da2. 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/HKG732493652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49afb1f2494d8a4b31ae7fe77e15ef662b11fe9e7864fbcb51567065d415b50f. 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/QZJPM2485600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9015a0d48a82532f58a51fe54274ea5ef84f20ae39740ba54545fe1753e8e7. 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/HKG732548247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f867a6c0e2559fcc357dd8283c9a853bb9aba964db4950775b4cf57780e2f1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732536707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4094e68193389d3e9f5eb843bde301f221534e5c9b7b51189bff5da1622cd016. 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/HKG732559165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec6f9ac5c9c7f5c6b9cd1f9160e46f6d1b39234d2d7a4de7ff445054ad659fd. 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/CN2DY2502754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7adb72dee9383e96b81d219e6640543c24dc324ce27009797757ef68ce912f1. 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/CN2DY2502759.