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 0xca8e4d8a078cccd4f092c6b8fa31ab0e9677294199c16d4326e3feb58172437a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ad829ad-75e4-4f9b-a64e-45c46bd28bc4.json and https://artists.proofprofile.net/proofs/artist/7ad829ad-75e4-4f9b-a64e-45c46bd28bc4.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 0xf9f7ee9e4e710094ee32c8240e4b9826fa862880b0211c36279ae644830ebffe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARC572404550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f8d6315b84121ed12fc94c9a6871986999cc3999417710c050da14f15ad579. 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/DGA0T2465949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf587d398f5d98c99741bf88d8ffe4fd0aa1062bbd2042f8486a55157c94bc161. 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/VNA0M1917676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc6175cd24c619afe615eaf950b7eb14b22bd8ce9f1e2b1d4e30a20d7bf95fb. 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/VNA1M2404092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4e3ef5afc2d3de5900ca14345a824d1b8a8a60b906ae1c546aa61d0f890554. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/VNA1M2404077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7f9f9461f0adb4626e3c0585ee7acda2201b0c3285e0e7ff3326f231374e49. 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/VNA0M1940385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7f929a5ce7780565df88edbce0a54dc8105bb2cf4fcc61f8c5da1d2a478901. 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/QM4TX2589609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1845d71c249bcb723f6ffdb529da239919f63a75f085c5e44235d653071bdf. 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/VNA1M2401737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f055b532d4b742277be7d56381bc101ecd28cbc755a2b1dd33bedd52f285174. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/VNA1M2401818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef8befb93b04b0899f17c18e594e886e754127d6fd35d4117b51074ea4ba233. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/VNA1M2402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4618994838986465fa5bc3ceeb240c71465a3f47f4235ff23bf1e7e3855886. 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/VNA1M2401982.
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 0x02a99d82a1e2d70d8c1c9ee51cf0a24033780f992c811f9e9da9c7b865c04feb. 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/VNA1M2401742.
Thương Người Không Thương (Việt Còi Remix)
Medley: Có Chi Đâu Mà Buồn / Đông Sang Thu Tàn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3654fb76015613f7ff2a4f46295cfe4b0f9f916d67fc6640643904700e6db9. 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/VNA1M2402048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf830ebdfd45833f4caccd9e11bce4db6bda6dba0453e91e7b5b5471a26666a34. 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/VNA1M2401983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace34a2ff24507f9551061fbc9ef3138f4b31185fd742ea124bdad2f2d32e793. 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/VNA1M2401863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e611b2e6589851bb44d7ba58e71e840490206c27ab446d15f88e8a981bff11b. 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/QZYHM2425223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a41e356cbaae6e3fc032e7f402855a923ff7294867346e4c380dca472dd5d. 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/QZYHM2423529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f515af6856a5f882ea1b73985b867d955fd32879f7247ff3685132d85f415e. 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/VNA0F2111069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdd5948eb6821a7db42b211830f9bfa306adcb99c32db2d610ed5ffca627081. 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/FRX872152123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c91f4f604fed12f6fbd08697ca95573fdf69109b17f130ea05f10c9c972f32. 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/QZN882245668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdd5948eb6821a7db42b211830f9bfa306adcb99c32db2d610ed5ffca627081. 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/FRX872152123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f8d6315b84121ed12fc94c9a6871986999cc3999417710c050da14f15ad579. 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/DGA0T2465949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee0d78ec14d58b813271fbfee11d4f7907d25368c207cb359bbb342ad5e138b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZDA52253473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0224d0801642b622aeba91d0810b8c2b425e67a44e37de23e6d15b54f79e3cd7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA52253474.