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 0xacf687dfac61690e570d953b3ca94ad40289808bdabb1ae112eff00c885f3e0f. 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/b40c89ae-81f9-4190-91bf-dad67550abd3.json and https://artists.proofprofile.net/proofs/artist/b40c89ae-81f9-4190-91bf-dad67550abd3.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 0xd6a537b66f140002aeb73768c1f1811d0cfa82b8978f9420f5b375c3c3c8bfd6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM42K1916972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f4dee4ab92de201555487da4ad5121531f8e38afdf6b4a624abe62e471cc6. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/CH6541951151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249510cf57c677c959c75368259bc8505d3a42cd14c3d1f602d71ee070f313b5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6542060229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e29376237a27c0fa026c119f376047bd764b2859edef0c0f0e58f99549fd83. 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/CH6542087591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012153ba5cf5a0833bd685a5788384238b72778fed5284051a25c94bd64868de. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CAWHO2028001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626d729d2eb1e49c929254455be322c5468d873ca04ee69aff4907659cade01. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCD592100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0229d00ef539cf4df0cb3326da7d16705c37b0be46a4cf4a054d615420573406. 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/BX3AW2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a83cddebfa1083b8edfd87e99374892652b2e44d4fb56c3aa913b9dd7544bc. 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/BKBSS2300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c189d734b72fcdfea30294f993b3bda65ecd2d5013658f4316f666b79a5867. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZKDK2121183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a5b443fb0cb39009032e26677893949e8a5a522295218dfd0e3f3bb32a2fc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCD592400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a83cddebfa1083b8edfd87e99374892652b2e44d4fb56c3aa913b9dd7544bc. 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/BKBSS2300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7a9cb5ce532c042417859eee2612aa50d4bcf963e29352e3e9c265952fa9f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTBD2428063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea1422d3b9863b197f6eb4a4f6b86b2b4bc4c86b3b505d73a325d207c45dee. 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/BC3RD2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c01c5bc5439e86acf14075b4fddb70b4e1cbad7fecd81f07121b1c8f5af67c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCD592100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5b0888862e2ad27fd92085b2309f5c29e90aa6223fc1376003807e4a7e8d55. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCIOS2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a1226f131327d2a104be3a4b5ab22d861ce9c369467f64387eec7ca315ebe5. 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/BXY3W2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc7661d463b10e2ca873291736f0bd75d49584186232a19e25fc7bfe9aa058a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTVM2103309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12bc23b5025c3e4f230d310ead51d508c0487a4f323ee1ceed28c1a05ab1ae7. 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/BRKGM2500005.