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 0xfa97e0b9b79b6109b6d83c334852db299a5b45821ac768783fade736f1bdf72a. 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/56631cbf-f36d-4343-af17-c75dba0ad541.json and https://artists.proofprofile.net/proofs/artist/56631cbf-f36d-4343-af17-c75dba0ad541.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 0xb5d3f35267aa2e7e48e2d7ffec01ae276203bde6e0ddb358066ed0a66ead68e5. 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/HKUM70900653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cb9ae8cdffd725e93672dc55d08a794904ce2d4385346cade7997c4c2cc424. 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/HKUM71000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b736de8472df92db6b05f1fcb6995f9a26326bbc7513fa91178402206a3fb. 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/HKUM71000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d257fdd216ad17724290884c10d89d7326bad9130bf1e7a4dcb123631181e79. 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/HKUM71000337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8142aec3c2d226d430800100ffc3ec146558bc1349af4a427f64d6654df1ae63. 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/HKUM71000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377818845fe4f4baf759ccf06d3ea87bee7710246e62cf5a6f8e7374545e6bbd. 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/HKUM71000339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1399ad2f83bcc8ad5fc81d3f7b851cd2885af80b449062519c19d76def8c2fd6. 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/HKUM71000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f089e1b6fa1cd22b9a809cbeebb7a1a8dde2f2ba68afff7c076357bc3dd64. 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/HKB120204048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dde6cf0ed713b24d163fe3b3ce3bd40abf53dec4be021183586ce5f90c9ae4. 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/HKB120210048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44dcd06c0dccf34386b06c6f9a31b86171ea326897af0c1e9764bdcfdbdbfb3. 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/HKH580460011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eedb7482fdcb7540ed21fff722fb2949489c907e041230137a926f9fcc27fb. 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/HKA610400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb7fcaff63ea04a44a050a164f5a4d9a7c66e140b2984abd4f22b719a3c2e58. 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/HKA610500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b736de8472df92db6b05f1fcb6995f9a26326bbc7513fa91178402206a3fb. 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/HKUM71000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc964941100d494b2e639c663fb8146361c8a5b2d32f2c5b296e77632eef7b96. 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/HKUM71000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c48dd3434db1f2e331e6f33e1024092994eba2ae694d39db39052adada96e. 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/HKUM71500051.
浮花(電影 "性工作者2 我不賣身 我賣子宮" 歌曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87563aa86e00c34fb55d973d16a7ed0c24b76a6d240d0d40d1b167fa7b6a1a49. 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/HKUM70800480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73f24021fb6fd9bcac941e8b48cf5b1f2abfb4a3fad77b02901a733bd76f2a7. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/HKUM70800254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1179902ccea85e8b0e0879322cb7380d5fae1436eea5ee6b87f40ffd4eecb0fc. 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/HKUM71800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403a8f802f23c0e8c8136748695ab8e5b10a8cfcdfbdd1b4efac98281eeadac6. 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/HKUM71200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c198b75c09a964889b4a7c4c187f4ed3524e4087dfa33184c0284edeeb94c2. 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/HKUM71200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ed042a6cbeb4e76c45bdbc0d096b9329549eece98e69e417ac48fc3bf77a9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HKUM71300192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071c208864b6e2bbb6b4ffb87c0cedb14e4160d8affdbcb3373b50ea47037609. 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/HKUM71300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf81fcabc124aeb82dafc9e47df8743202b36488594b2b4fae80ac815ff1a144. 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/HKUM70800833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6151c86968b3ef8a9ca64953242d1da9509edf07fcd9f31200f56889a69e5078. 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/HKUM70801912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcdee68d35102de68162783c927150c8e9493d150e32e8067f6d33bf4164ba7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:27:53Z), 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/HKUM70801914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c884dfde9d29cd9f5cecffdb6030899388147efacd3429001797163bd7788c. 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/HKUM71600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8a4fa053c16585bf9d9a1cae3aca29827ddb715e4d104435eee7e3dfd639be. 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/HKUM71900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe889cd6ff49bd78d77e7ce8de40e1c7a940be61f712238d1c65174fc064daa. 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/HKUM71900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23ea2d9a4b7ba90044d6c3926678e374ab285f1a5b9c5a36845dd31c098352e. 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/HKUM71900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d9420de97d2fab09df17b3206782587d51df744c1ba94d48438fa23682140a. 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/HKUM71900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7647c24316da445c9a7036ce617538f52ecb327055b62dd0ec8872c797806e. 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/HKUM71900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddd96f683914f2f6eb0dcf1b0b9cc63f365de8310984279c5b04145f77983af. 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/HKUM71900102.