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 0x55b9bfe1d2c1f60beb72d900930f9d09aa5e67e4857ad2421fb511c97d78e698. 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/32c10bc7-ef04-4af1-aab6-7602296652d1.json and https://artists.proofprofile.net/proofs/artist/32c10bc7-ef04-4af1-aab6-7602296652d1.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 0xf700940e970839a939bbb9d50622362d4460a6026ad599d9285e4ad0887c6718. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEH742051478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216b9560b4e3a2076da4a038480f4797486d3102696818c89106472ae714e625. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEH742051479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b7cc11148593ce835778b0a245d5fab450222551605f19042ba78dbe4cd346. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US83Z2132209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d67a3e56e793f9a5e06bbe99348014ea6aa807861ba2b705f2e16bcadd2e23. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US83Z2132216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac301375cc31a11875e218d29f0209d8344952881af83bbcded58973d23ff0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/US83Z2132218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37811fcf14334d9135d0168b0a015dfdf257229be75af42683761fa9590393af. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US83Z2132219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ab39a364f50c5beeb518cabc83e2b7ca3f6bcba61881d85954e2a49c3b2817. 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/US83Z2217238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f2173c9d16067ed6e4f6372d03b879ef62cd249b3b58fade80259b01cf5a96. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2232502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14059e371a31e745b52a5505c220ee465858515207378f31cd3e2ec63ab31486. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US83Z2409591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0343887d67efb0bb8ad0ff283eab9a79fb41bcdcb0b98a9a8036659a820427. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2423140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76afb6a725d52845ce8c946c8e8c89b0b0ac25226ac8d62fc7fe63e7a2df6f29. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEH742526112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b7cc11148593ce835778b0a245d5fab450222551605f19042ba78dbe4cd346. 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/US83Z2132209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f18552f35a9f45b29bb25b34853be3461151941f4809958d7a4fd338f224958. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEBG61703356.
Oriental Touch 5 (Compiled by Billy Esteban)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b7cc11148593ce835778b0a245d5fab450222551605f19042ba78dbe4cd346. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US83Z2132209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380434423205f068411cf2f35f1eea6ded17645cf8f43d4350fdbbb7be48cfba. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ES8741100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf700940e970839a939bbb9d50622362d4460a6026ad599d9285e4ad0887c6718. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEH742051478.