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 0xc53ac46cc3abe77db306a5dc6d911b4887e070ac7243e26198fd06f67e8779f6. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5868f9ab-811d-49fa-8b65-2675246de961.json and https://artists.proofprofile.net/proofs/artist/5868f9ab-811d-49fa-8b65-2675246de961.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 0xde2d6a89a2795e6040ab5e696352f5cf7a7ea26c461158bbf7514dc9b3b87db3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/HKA822400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376a20125c9969d6bca53a2f42fc718eca128d71ef6413324cc507b97635cfe. 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/HKUM72400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800cf97de322feb178a4c9100839d15dbf8839529dcb124e8e73d36cc7a1d20f. 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/HKC632408069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d0df9ed8de17102d8a132c368b4e5187c2e49f9f177160176c3cd2ad2846a5. 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/HKC632408078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a37c06f59cefacc44b4a32c918afb25c7b4e52547878c9a76bf97cd8d0656. 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/HKC632408071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7848b2b64cf650221c39ff16daba11637658c7cca21528e8320f53a07e44f083. 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/HKC632408070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258287ff4607461e2a413a6ff48c323883a34fdacf3539b659a6df6faf394613. 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/HKC632408072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cfb7a59d337c139fa03ce89a75a3fbefc5067d5d66b374b878b6c6e9984a50. 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/HKC632408073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e6c418db09863106ef5796b7ca9fbaf3e78683ddb607d46446d20eeb159f1d. 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/HKC632408074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7201e696b7f8ca292316685501ce900514f8a6f04d992ebd5dd9eb09bbdc3598. 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/HKC632408075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8d494983159d06059f27b8ae71e3a156f89afd165e4ba7a7e39a9708fef19. 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/HKC632408076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d19aeeaa488ff5b6e95bfd4fd0bcfccda5497f5f668efb7d85fce423ddf06. 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/HKC632408077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72979b5b61ea63035b39fbff85e8d9dab5ba2fdd583d33d49573c72b5eb4427. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKC632408065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ac2a499245382eae7de01cb057605e5e27110a75f7b025bfc9f0649641dcb9. 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/HKC632408066.
前 (香港特別行政區成立25周年主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff57203f70069dff25a3fcb90f30a673970cf0d741391c240b458a86679edf31. 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/HKA610600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dbea5e2fafffaaf7853a05b9a0893cf01bd92e0109f2a7fffb30007f3ce37. 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/HKI498723101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515033229fa310c57ed121b7f7e5513592ad57ea513dd62fc691f86e77762337. 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/HKD048800805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd545971eb27a01a560ad7cbf1f58de24c9192f95f1d25daa6addca6b14daa6. 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/HKF360605001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd847ad5eda27e1392586862de2ae6f8b85333e1a2e5deddb2c3c34788c9c8a. 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/HKF360605002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e11ec0415da9dd9b68d99e3f4344127a39cd92c26913202c5e13ae59f4d2a4. 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/HKF360605003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1ff5139c522a77950e4297e36e11a23470cf16bc266fad2714f2175da3a9af. 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/HKF360605004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a32626285aa5361b7b11569faedf909dddeedd208d96194cb87297937cda118. 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/HKG070400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641699cff2b2856331cb14db58d20fd92ae1d470b2e47770ed2b4c6924b4238. 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/HKG070400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298a02fa3ad144d07cfedae780ec6e06dcb6030e8c3136804ae6a4b9b2ff3e73. 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/HKE511800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087866207ecc1f03b81be6596da1832082725288310c718145ce44326a3d5af6. 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/HKUM71000363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0c34599b9578c3b92f962aa1b7cdf0082341b54c4970f7fff8c12ee0af1b40. 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/HKUM71000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3452528f79758c7c57586fe30deead3d5f08460e51ee89926d5a4b62ea54635f. 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/HKD250511212.