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 0x40fa803111b9ecc56215b4bc9e1b13ac4808744ccb50e93c24762f93da21910f. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78cc582e-7db2-4611-8203-662280a819c8.json and https://artists.proofprofile.net/proofs/artist/78cc582e-7db2-4611-8203-662280a819c8.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 0x95c785081fc1ceaa484b35dda37897173b05f224dd65e83d3b55379d17f03938. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TWCC31902256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa352031e579dcf0b3e35709a92003798125ec3a2f13a650755467a0aa9a4be30. 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/TWCC31907990.
Last Hug / Cup of Sadness (Band Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d9d9caabb2ec09e49b7150b32f3bd0e3efa10379222bbfe094db532a296376. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QM6P42128407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4696efdae1cd22484bcb929139b16a029a2e01dac777eb1db1c67b3200498070. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFME2157970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d56785703acfbd0b69a9321fe9469e6fd3f29ca40d2d2256b0c4ce6cf4e108. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/HKC652500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa862f3a2b11751aaaf4790714b9de59d98a4d185c60420de2b1b30d1ba427cc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/HKC652500447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bd72670245ec06c0875564848e5c0960772767be8281edcf091d6440f50fdf. 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/HKC652500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f3cef2ad93bf41a67509f7532f924c4e957bb269ffcbd712d0436081a1eae7. 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/HKC652500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda9b68d07c3553c719ff8675b228a67f5eb60f82f0a51f29f2e014d911ea1a. 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/HKC652500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71ab41708c0854d739be6e2edeec78315b72835e65fa31c389e872224a62eb5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/HKC652500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5415da4d55389b3a8c7dcf5f4f06b5673be4135e5e3baa904f2893fc58d7decb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/HKC652500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9591cf15838c8c1169264782f1cbc787bd3018297e2624ef51dfa4e2e23275. 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/HKC652500454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e07e0a060b43ce325356084dfbd5a5bc7c4deb22c5341f9292c98f143c94f02. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/HKC652500455.
I Don't Dance in the Party {Ripple band ver.}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355fa8fdb2121c5f00b133505f024e3d85c341cf30f818f62976f66ec009b3c3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/HKC652500456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0843be937be32e3180c51b4910a0b74697a00a82f4377e1a5271b207ad5e4b. 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/HKC652500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4469d42f4f1ffba334714a374be6f6a3535b8f28769a0f563a6abffb50226. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/HKC652500459.