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 0x757117260d8006ddcb2f67eccb7247af4c0023c5196c6013054c04a9895b3302. 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/9243f680-af58-44d1-a681-a8de1db2c1da.json and https://artists.proofprofile.net/proofs/artist/9243f680-af58-44d1-a681-a8de1db2c1da.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 0xdcfbbeb3c8a7bed088e741550a0f03565533154c02f7bc819ee9600be67ae292. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TWC370205004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9df4cd7d36ad57c9b5812a57d605878b10fa0411ba3a9ce6f909e3528d0939. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TWQ750600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd61195db4073f48d0562eac00928c8fc65aa4b3a6365a7a066069e113e1f859. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TWQ750600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02696bdda95f465a67553a8b737bd42fcd177390cc9a7658020c134a9f44d90b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TWM710800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9157040b0486acd545de080d5959763a8ce2f030b83b52532ee2e09682392e34. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TWQ751600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55f6e5865a43e5b7a1d02203eb5ef1e631ce546323557d1d1e57f4f6b720848. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/TWQ751600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c23df582bfe9d85f83c4b0507486f6801462ebdc8d1b9b6e9c0b7447307cef2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TWQ751600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175930c9c7047eca2a0c003354cea68378abce6e27305fd82fb381b0672fb33a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWQ751700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce17778e8e96f8154c3b26422946c1a03deb2cb54acc47ca0b3e1d0df7d3c62. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/TWQ751700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa4d502246e4f980fa20946ea198c754cdfa5dc2883cfbc63d8d5c125cd73a7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWQ751900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0483caf7f56ea76cd9c13dc249bb1c204424f5ed1a788392ea11251f1115fd. 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/TWQ751900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844f9739aa7b8ec351c3d484c44f6915ed2163853cdf4779c84664b1ae691749. 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/TWQ751900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce85784a34d3d8bd62e402aa8b3c2189ceea04fdfff33faececc2d0bbcabd283. 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/TWQ751900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faa62c911d3560d60f3d5b1033ad92b4fa69026b6b5dd47c56c99da9a48964e. 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/TWQ751900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9d813b2750f9e2b7375de0c5414ed20021532023270e3f02cec04c4edfe10. 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/TWQ751900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb758e1605e400ea1d004b09687d996bf97e876780b3a2a6866b8fe29f863928c. 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/TWQ751900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb947fdff104d7f0896b2c5ad055157c816e9d0b44880e4c810103357d815eac. 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/TWQ751900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0e527db58f7c2e67e8d8e8a4455b8db24f91ce0ce551b9f1b02bfecffc452. 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/TWQ751900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7970d9d6b0741f9e7a536e23e3ccbc063bbd4c01fb090f224b78d31620b34a20. 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/TWQ751900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51de16f646d3fd911772ca266a58a932b7bfacc47d3a2b5ed8574d85c39a7e2. 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/TWIB32100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eefb6da398b2a6e70e63e260ae715d25a070e88780b53546f4bb4b56ff9bf3. 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/TWQ751800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd823cf1670592446070c2d7aabda36ff28fc6bfb8a5d554ac91b327c2c03029d. 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/TWQ751800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89dacf8554896481247c7925a1603711e150d654b5e39c76626535e3de4a55b. 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/TWFX72000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd050178d7e5ef513cec7e4776e9292bc75a5093327a1207692653839390953. 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/TWFX72000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab23b7a5db9af1ab953c5c802b378a20ebae9a4147dac6b01089a75bb0c64bc3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TWQ752100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4412cd2b98af8e8a8fdf54215d7f05d30353e88bca9e118cdc6f412141b137. 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/TWQ752100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c924348672f3be88733f62d52633b94db21911215cd61cdd3497ab1ff78ab1. 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/TWQ752100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24108f37f9b25e4233249bccd6685b5403c3d5689068e721dd81ae2f56a87a7. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TWQ752100004.
冷冷的南風 思念著你 Missing You in the Cold South Wind
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066839e07cc0f6e9fc7429dfab25fe9cb98374e94f6aeeea2e7843d3fe3b6fcc. 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/TWQ752100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40b7e9a9463af10cee2878bea66bba7ff1c043ea86176f247cd8b26cb0a7b87. 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/TWQ752100006.