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 0x138547e53b249a8eb09adcc8224b5ee7c39d78fc3e504a8a499e78a5853f1b60. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7119b38-eb98-44cb-a07d-0c01e1ddcc8a.json and https://artists.proofprofile.net/proofs/artist/b7119b38-eb98-44cb-a07d-0c01e1ddcc8a.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 0xbac6778890006f4287b573f1bbd85084bdaf494feb9778688b8a34a6b56c20fe. 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/QM4TX1788334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2427a8da9347be2ea2e97e0422b8599c7be6dbd892ac56404ec6a9cddc029e. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QM4TX1788335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae4312bfa3a7eb20195e78fc65d18de22834e3d9c3f7097653de2d24b798d1d. 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/QM4TX1788336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda044302a2f6dc151341cd585c17c82f60cbe0f5d1f7e426f54324ef43486ac. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM4TX1788337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe8340bf0a1183ce7dc684118cd01fd46786f3f86da08d6256d908697b11a23. 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/QM4TX1788338.
To Everyone I Could Have Loved & All the Places We Could Have Called Home
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eb0f0d027de0263087fe91fb5e6a36e358f7fe9512ea037c43ba789f588848. 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/QM4TX1788339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8a4e34be42558e8c001ed0536b006f66b2f3b956b20b1fb99963fd8d1b61e7. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QM4TX1788340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8520d9fce1ac359265c39441e832cdc930852182b621bf5265fcc974d7e43c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QM4TX1788341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7837eec4ae7f19bf9d354813206e658b5789e0811291cb4d857dbceb73f04fc3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TX1788342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd45474a10ce0ec940b8c112c121d99ff75d6767c1304232805ea3975b3117f. 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/USCGH1478406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895e277c133b4b2e12610bac4012bd53b5c7ac0cadb7b4f2f6753813bc908b06. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USCGH1478407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed79e242b81132be6baaf57bb5d83883a8b737fa813dba50b33edebaf7417704. 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/USCGH1478408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba9df6443f856bf4be8dd4c5154b818c2da0a3e21829087763e1ac58b6ea21. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USCGH1478409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f45af16e85e62896c212e43a40e82cfaef200736f8fa708341f6c2a5ee3149. 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/USCGH1478410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796c6cf9266e406e17d31a6e63a63ba154ca21b625b5041a11c75afa488b9b0d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USCGH1478411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ce21e076effe59eb157cae0eb080ea6062c91a205e61dab0287f41c0490f95. 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/USCGH1478412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d2acc9b810f71eb574b892064c109d60b6e276706e78174f82d618ffca125. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGH1478413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1453f72e6cdedef2a60c6dc4f8895144c98ba655ff6ffcec576bc713254437b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USCGH1478414.