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 0x2f59a2cd4d2789bb6a24038dc1a075002c6d1b01f323a600db3013330e945dea. 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/4bc56c6f-c9b5-47ce-85dd-9504a3e5437d.json and https://artists.proofprofile.net/proofs/artist/4bc56c6f-c9b5-47ce-85dd-9504a3e5437d.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 0xc60c35a8468646953ec5d7e5604f4e597b29b3c7eef5d86f7a459ec61c400347. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INO312300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40769fba6420060305a6f7dae7c53e1292cc67fb03a503c5e9fea702d8727f3e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/INS9W2300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afb9605620465c07a33ce964cbf02b5691447ef02b7c192ae944e35a5953460. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/INS9W2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefe8c6737651cf927f0678788040d0d3082eda382604fd2b8befe3889cbbc43. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INS9W2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78596a2e7fea78fd25eaccb604582b551419be21ee0eea93b97699f0dfdcb67a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INS9W2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35cbd9956cd16298e1a43d790d0bc3a965204a2cfe52d677089024e8eedb36b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INO312200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa29d22249622f3b8681b33202c9d8e457246a83055ae6f97b8c6e967be2c95. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/INO312200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96de6b6a9d652a81f65189516175177eccf45bbe33b11ed363a726c56e8894d4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INO312200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700ddaaf37643a7fbd48149eb02471a0e7d114682e23a3c3db493906b8f03d0a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/INS9W2200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d90e94364ec5f4face116baf5aa622c3b072cc6df288fcb2891fb4acb26bff8. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/INS9W2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c41cbc42e2706b007c645b99b32fcb6156c57bdf2d89c3d964f0efb3b22c04. 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/INS9W2200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9778f2c2d6dd540b6fabc5655ddaa0096084de80be8c54b62ae36e58c1f1f1b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INS9W2300181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34bc2451e8da8c5ce6a02129da2df55ba434999ea1a35b29a624b4bea162499. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INS9W2200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42033fd3d98ad5466f4c2568869f72d559007ae499c4c9726cc2d51dabb04b9. 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/INS9W2300225.
Nini Mokol Ni Nasikma Aw (Acoustic Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efa4f98529c56246e84dfb64d1ccae81228b709ac0b1784204f86a018897731. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/INS9W2400366.