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 0x54139bd61850a0c1c717fcdc5eb39805e2a06e93e19b5be4d0aacbec96676180. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f231a124-277c-4481-ba20-4b3fa152d04b.json and https://artists.proofprofile.net/proofs/artist/f231a124-277c-4481-ba20-4b3fa152d04b.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 0x070314e54dbcd4e447e729b5e8cbac5196a48cd554dc3ae99d35e0952dc41578. 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/USBAE1599001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac204c1faffbe4feb518747633187add4aa8b25088968f349ca53ede3459421e. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USBAE1599002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d2b17aaf0738e1aaa4efe84efe375b4f39c962a227f06e0bf958f20ab7bb13. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USBAE1599003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee43ec23ed48a0de865c6656a005bbc8d173945f84537bbeee17db208a80ba24. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USBAE1599004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7252a9e04dc7fd8d0ebb73aae89445dd9728e863f924bf69022c0e7c2a81594. 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/USBAE1599005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b17e187257433f47a1abd8d73516df89f67b19c5db1ed1b114b07fc65179e92. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USBAE1599006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d3c179db9bf0345663ee3b917d8d7c6e2ffd343bdabf2caf3b3b4cafdee147. 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/USBAE1599007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88441644ad22ce67904433006c45cab871a56427a0c17f33a5042221d52b83. 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/USBAE1599008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0902e22e1067f15a77afa7ad76a561d1fbfbc2d86cc308e91aaa444fa5ee0314. 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/USBAE1599009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a751d9cb6d7e2b8abc56bb31cb6f7f5de6a95ee75d2493da86f5488bc355eff. 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/USBAE1599010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd067fcf7c019676a0a5d8a1ac9a46b188fa1bbda6e12b78ebdb171d0e91609. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USBAE0600566.
(Think I'll Go Somewhere and) Cry Myself To Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51add93aeaf453fade326c2785ac6131ef0e52de62ef1a546046a52e4a97637. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USBAE0600567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86767f29b9a9c7dcbb953dfa25410a4af042005702867e95b11f5a2656b844. 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/USBAE0600568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eeb983153ee41b078ca8d142733f21e70077a4e395b66fe9b3bc823bf6246d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USBAE0600569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc200ef4a56b6237c18724e68e9c38dc3f1afce92e27afa022cc461351d4f7e2b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USBAE0600570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24089e1e4692d512eec3eee72dac970ee35c2e3c3b30c0ba3b5eda60f2a61ddc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USBAE0600571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f7cda09bec0f17aee7faa75b998498c255d8e2066861ab3849dac6411522f. 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/USBAE0600573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d3f0ff8b015ace2a0a9acbf6ed3cc5c0c46a4d5588c60247f3dbebd93e2e7f. 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/USBAE0600574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc68cf7cacd004008c425be4f45e0228be691808a8d9fe169418c2c56ef65fc8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USBAE0600575.