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 0x4b3507864f5b27d02e7c3cfe85a51a72976649398bc073ed6a6ebddeb2ca98bb. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2e03c27-5293-4d9c-9b2a-f2ff4e438e34.json and https://artists.proofprofile.net/proofs/artist/f2e03c27-5293-4d9c-9b2a-f2ff4e438e34.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 0xa0ada40a66b526aa0c0ebee6d6c11faba6624436253ca9a1ce968640e991727c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR59R1753376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e36cdaddd2a20361834aeec8252afe854c4757d3b288c8331098f2399270fa. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/SKM121600108.
Csodaország, Magyarország (Tüzijátékzene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb6ef50627fe6f2216ed1001ce266a35e989ce067a7917a636c53f945eaa37f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SKM121900111.
A Csitári Hegyek Alatt (Magyar népdal feldolgozás)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a48d9fbe4823f57997e576562060ebeaefd021e4131ca8ad0b5d554ea8b110e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SKM122200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db19ee4f99ff5f884c476300ed4f1382ff7735bf368edf0f47cd608e38659d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SKM122200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2ea84bbc44b0fd29f15919ac53465b9919357b331f058c661ac1ef639a50e2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:57Z), 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/SKM122200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90103c2c8baad13d15545c1c54c9522cc138b396981fb310938d57ed12298f6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SKM122200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb04df6cebf16068db94f9d844f9b33cb752a01e096fd926e09520ed0dc86d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:21Z), 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/SKM122200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6c09ba5c14947e4bb78b607ba62d9f80fb01e350b39c1566ad5c5a37bcac46. 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/SKM122200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34f02750ca22528be9657171d44eaa32754f0f306b7dc40584ace3cb90d7955. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0L2318292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94325cd53fe57f63ecb702cf09701f1d719ab43ee4f6dc3599c252bea8b009. 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/SKM122300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce293520ea95f9e7942ad9bfd67523a71f0f590a6a8c111e6dc1a00b4b3d3c4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SKM122400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a575fb0cc94e9871735106590005cd78a055fb98c45fb21bc055d67d1c5f13c. 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/DGA0T2454543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cfa30a934f13a865cc41fde98b14046ad420d73b9e3af5e812d4993ba77017. 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/SKM122000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32c2963b1a51702c2af4e1918f49d928d58f75fcdf6cb5a2b1317c264cf3e43. 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/SKM122000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350fe174a9058672f9c4c829ebe00257202f1f7ab2bd60a337970591c6c1968b. 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/SKM122400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052c73d825d8d97c4f8f60edf64fbf1d47be1fc192fee8c2dc974898dc8c44ac. 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/SKM122300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57865b1f12238fe174f4001aae82c2cf7a64c39e181a7562b1b7272cfc0093c1. 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/SKM122400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28157d1947e1b37f7496e6f8863f9af1db71cfaad6af1c3e8c90a40ede60d0f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DGA0T2454542.
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 0x7dec1930e808e0943534fc32cc66a78305b1381695e04349585b37e4b2144c30. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SKM122300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c15af3d4e2abb865bed721e1b16a38c5a11c8a499e086959e0fc10c3b91263. 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/SKM122000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378972764dc15ea38479ab9aa9e8e2019303bf3bd6befdc499647c2ad01a4ed5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SKM122400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e9545142987818eea1c72266a95a30ffe2e9638741a63ce0e7e3e5e8778bc. 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/SKM122400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b616151354aa9907402f1c7754ce4329ea4cc2634fc5e0c1ce9b49923886cdd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SKM122400106.