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 0xfe3a7c4b9b3801b7beeea8179def19c3d9be175a2f0a4e68c9abf7e981df9d70. 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/6706d97e-ab01-413f-a0e1-75ef428159b4.json and https://artists.proofprofile.net/proofs/artist/6706d97e-ab01-413f-a0e1-75ef428159b4.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 0xab5f52fcd61bcbf8efa853f3d3962d52ac31be6ab2762ffbd3dd3ab2344dea40. 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/QZK6H2060785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a66f92eefaf55fd4d2648e321f5c274599f92c4618a009693e93518247eb3a. 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/QZK6H2060787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd3ed2e5d39c69e0b5ac7ad5d2f9ee536dab00e9b1bd9a2fdd32de35d33f90. 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/QZHN32238501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa241b142b2782138580d1633091aeda361c62f0df46948c86ed276d2c554e2f5. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZHNA2230463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be5e80a9d4c98c3023f6ff1a9f89e005845204dfff297e4b0692ce4b2b96d05. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWZ2388658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0da4368ed55f33b4ea24db9152c487db6f4f06f200c0b494fe3746deeccd996. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZFYY2461446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91318224b645a418c8cb4e77464f04fc954adf42a14f27aadc5e4bbe9bc1484a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFR2496918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506453fe57b638df0dbee1011641fc9df455bad686a0ef4d562ec93ff4539afb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLM2374229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa581749118d4d4c2f9fff78eb65b434d5a2b746cac39ed3528901cc8241094ae. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGA2278146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee774aaaa4dad490269566636a2bd82c78db3647cb37750c534554444c6167c. 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/QZFYY2262698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd3ed2e5d39c69e0b5ac7ad5d2f9ee536dab00e9b1bd9a2fdd32de35d33f90. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN32238501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a254eb656ee34f9fcce3b3c02a6decb521522529a8603130d3c0ee47cdaed. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QT3FE2536035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fd9cdc6ab01a41c4f178fb066242c27c21e88af21ff008e5c2087ca211830e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMZ92447477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee774aaaa4dad490269566636a2bd82c78db3647cb37750c534554444c6167c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZFYY2262698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50c04b26a6d90174d614536653b039deb5a004ee2445e462f5806eed32d463. 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/QZES62280868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506453fe57b638df0dbee1011641fc9df455bad686a0ef4d562ec93ff4539afb. 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/QZGLM2374229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946bd8adc91e6011415a1d30ad4200051843cb447de867f28ffe0c43bfd5d44f. 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/QZGLM2374240.
Instrumental Indie Folk: Music for Focus and Work (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d053d080dc59e64d6e5d3779c56021d8d76a6d80f84f49f6d96569f05a6f41a. 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/QZNJX2409032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa581749118d4d4c2f9fff78eb65b434d5a2b746cac39ed3528901cc8241094ae. 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/TCAGA2278146.
Instrumental Indie-Folk, Vol. 3 (Alexrainbirdmusic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf265f072406a5f2ac739d34234bfa084ef4139f50fbb5e4fa5e1e712c169df. 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/QZGLM2445791.
Best Indie Folk of 2023, Vol. 2 (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae03d1e020b443bfc75014d5324f2f47c648de0dceda44eb98281f4e8cba7bd4. 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/QZFZ32300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3b8640a1272d8705512c0658b27d873f2ab78aa56ab800abf88bb1f8de49bb. 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/QZDA71826298.