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 0xda2498b1acade55ce2bceadc7c68fd2251b2a788a6badce1ddc70e94ba955382. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63458121-3a2c-4649-be27-eecea2080d9d.json and https://artists.proofprofile.net/proofs/artist/63458121-3a2c-4649-be27-eecea2080d9d.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 0x1c62dd0bea4b65e75b8e4ba4e569231343d530e3895c2938252397d5aafe3d03. 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/QZPLR2112080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb300a09edf29592770a33d792a737ebd82defcec9fdd1c57e7dad476cf1a11. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHNB1958721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8d888a853dbfd67fd979f5b31ea8dce65d8b2947297c138a3df0716f9efdb3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHNB1958723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8106d1b03a73cd70bd141308d106121f78454712d2e855018eaf5af028a350. 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/QZHNB1958724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d3f156f28ce186e3c231b75c0a9ad257d22c148199ed43c0e39b0ab0f89355. 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/QZDA41987172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e53f731220ded67fdaefb76f14aaae15ca8ada0e69cf2744226ec24540c7ddc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDA41987173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80bb0c9a7fdf4874aa340756ab92b809648fc31f4a3a4148fac8cb24f95fbd1. 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/QZDA41987175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d316de4897a10700a6b01785eabc10dc9a810ea993bef6d1019c998ba724ee. 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/QZES71839585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d577249dd0e21afe259820b87caf0a7f89f14adb7343d76adda70f775093ede. 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/QZES71839586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea39d6fe5901573197e33b0d7e4bc96ca78d583bfe23045c86140b70283f8a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZES71839587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880194da0a6a47de41ae76d8c92a13f22ea377a071177ebd923622bad27cca4f. 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/QZES71839588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ce9645130ed2a107d05c5e994244d6bb8055ccf5c41985be72f1ae1017acdb. 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/QZES71839589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b51c332bed7f8703c535c3f0f7dc23315db593303f46a6c59ecf528ce63abd. 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/QZES71839590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeae973df9b9e907d290483b32506ff999d228c1b4219b872ed7367332779af. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZES71839591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b85b4195e91089ff22b617822bb834ce50ac13d0036eb4245ecbe8693eba15. 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/US3DF2436206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d133d433a822bb219903abd256c846d7f15e1fdb95d256f0d899fdf85f719c. 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/US3DF2436815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db1c8bdb6e05540fa3238258b675e663ae91d947f363ea5249102e783bcecd3. 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/US3DF2436820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea446f4b30396e6af12dc833257f125c234381656714177f18e9e0adc78ea3. 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/QZFYZ2411155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4008b9a92d618d78e6afafb449a5a2a515c30211a810010a9dd79a93d7acc39. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US3DF2232552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c62dd0bea4b65e75b8e4ba4e569231343d530e3895c2938252397d5aafe3d03. 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/QZPLR2112080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c883159d80bcb8f36d290bb271dcbb1bdebdf4dd913d7eef3b6b8b90c93f23. 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/QZK6F2111941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60770aa849d878cc9a31ed853323af9235c27773f10cdf9abcd23c4ba21b7fa. 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/FR10S1935602.
Cruel Buddhist & M.Du - Sweet Song (Outro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee6958128eda1a168afe7fd585a9fb9d2ff1657dcd0239b2b00fa5ca511e219. 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/FRX201819706.