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 0x45b83548b8d5794cf526aadb11e0547678e1ffae6df2dfe806545c2f6864b27e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73992d2e-3049-4c72-96d5-851e2474753f.json and https://artists.proofprofile.net/proofs/artist/73992d2e-3049-4c72-96d5-851e2474753f.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 0x6aae6ec1760ee70f45baabdde0741a850b9d949e781b1ef833ddfd95e5d04334. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB72278580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b4c77cf7ad63276544cac780a98494fc8efe96c7d866645d091cb661a00998. 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/HUA612404417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d2225681331ded48a02af1809b62733a2e1a737caf104de6c831a52a4988b2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HUA612404291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a68fc596d8f825f1b689a2cccd6b9a4108e5d0a920afb4bace5c16e1da8e73. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA612404418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90600c769e96a6bf845e28fe9251ae6588e44ecf4fa3fb7b0dd1dfadc5a74c84. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/HUA612404532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f2c5a4271afb47fde370a0b6fc1b2b786539b459802d1a9a7a0c941f6ec745. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA612404420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b01fc8716ec1f597d947f5a06aea72cc766d86f891ac211d63f0eeede24006c. 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/HUA612404422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85875145c99ac26aeddc207b936cd8d5e161fae06ad989f9f62c56866a41c998. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRX452522945.
BAD ENERGY (feat. Johnny K. Palmer, CARI, WimmR, Realecta & Székely Tamás)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e14559e6fb2bb365629d4b660a3584fa8618ef26e0937417db3fc6cd743c8. 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/HUMAG2400241.
aholsenkiselát (feat. nameatmark & WimmR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b60ec4ef6682f883484514f62e6a49795527583a812d30c052c6c92e7e33060. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/HUMAG2400281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ebca06720421e28d5c2cb70f995ea32d60db5b2bcb253c4572cc492fb5ef6f. 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/HUMAG2400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b60ec4ef6682f883484514f62e6a49795527583a812d30c052c6c92e7e33060. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HUMAG2400281.
CSAP (feat. P.Y.F.U., nameatmark & WimmR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451339665438420ad072b71ad6057be099ffd4344dfebf3ae4815ab2fee1802a. 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/HUMAG2400169.