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 0x9c0f45699e7258e1d38bd69013f45b39a73e7b1dfe9839221dda96bb61da3534. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50c61aa0-bfc3-40f9-93fe-31ca573b1dd7.json and https://artists.proofprofile.net/proofs/artist/50c61aa0-bfc3-40f9-93fe-31ca573b1dd7.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 0xa8ad0a246185a2d6cc9765742619983a94e903baa26241d9bff73ec9aba49f58. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRX872108497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449537ef5f1bd82f79c423ad1eda3e40aad02f3ccf10d920d63045a391cb8d2e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX872108498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955996bd1f991e9f792de2ae91610324834aea185dfcabf05b06c9bd344eb485. 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/FRX872108499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360517e5d92c4f73eac8581056fe345b9564e28b90f037376164b6abfeecf800. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX872108500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1926ce76cbeb7eee4d8290d075720fb4a77fd1eddffa9b8acdca748c83da131. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKPL2014135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5a282a556440690697fc51cfb1834884b9372ba11675c4fbe0007d5cb5b81e. 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/GBKPL2014136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23777424c567ee85b18f9cd5c9af92b4809c98e8533bf24049ee683eefa4f345. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKPL2014138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eac4ae413c922307e46d3e05fe4bb1d67178fd7ba34717432ac4ab2c3af975. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/UKXN22217193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e0194c36187f0d1560ee6a92ff03a6c324ec2fb7d75b52249194a0ae5e0997. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/UKXN22217192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f56720c1c33d0e50c919b23072dac97bc22f186aa2737feb747adcbc3de7268. 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/UKXN22217195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2fc2a213db0b795607e1d7af4901bc132f1fa7f3b1e77bfedfaba5abe5426c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UKXN22217196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1594fc56fd4acb8f85d089612598c5b353c64a10c3d75d176c32c89a964cdd. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/UKXN22217194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfc9191a9e7fd5046cd92c6bcb89aeec81f384e2d43499c5e037e96e8f4b560. 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/CNA132301884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c43b5eae3ac373da6b48abce2a28d8001710cc65e51ad3471a1b810367d474. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CNA132301885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2fc2a213db0b795607e1d7af4901bc132f1fa7f3b1e77bfedfaba5abe5426c. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/UKXN22217196.
HKCR Annual Fundraiser 眾籌計劃 Compilation 2021