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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e11b97ebd30712cb15c0f65b664081083dbed5453aee7a88df812d0756eef. 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/7e26310f-a655-4d6d-93a3-0384ff4202ab.json and https://artists.proofprofile.net/proofs/artist/7e26310f-a655-4d6d-93a3-0384ff4202ab.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcdf601dc376a5f9f18959b77cf082b8e125d965f2f05f03c83a1bbe66c65e7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBLV61912336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69306247dbe7c3dce47a57188311b2c5f38bfad0f2d93a383d4b1daf0b6bcfa8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:10:17Z), 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/USANG2011552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cb2bfe3c31f17a34d4d4aa79fdcd78552a6b6122e35471aaae252c4918cbf6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2058739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b34644b67b49a421ace733896ab2ec0c8943ee65a3ba9a1da80b908cca97390. 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/SE6HN2007972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb2c3f3a3a1792c60df681b04e098608fe8b13c95b4d9d9d5d07960afda4c6. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:54:53Z), 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/US3DF2000807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce233d8dc2aeece20da5731f21eaf0628b4b90602aa5771f34b894d1fdab18d7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM24S1911834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f54f04ae571e39fedb1c92810154906da9bbfc69972e24397aa70ff67557f8b. 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/US3DF2175088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6d1a0b4921bfec0c53af11625a8475e2bd4aa5786b248bc74fb52e89a8d806. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:50:36Z), 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/QM3DF2127371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac92124fb6b84583bf2e393088b27e69f32473be50da73752abf107ed28ece. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM3DF2155667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a231c90e6c7a5487dda07e659f334762efe6acef82803a85cf3dbbcc6435974. 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/QM3DF2155666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626f219d464d34ae9f6f68bb695b5feae145dd34a60e618ce956021313d598ae. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM3DF2155665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb60002ec9f3bc01ce77cf682bc775349365586f4e72d33e2564b6b7efd525. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BCD4N2200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52b9c5ddbbc68427e3e95f7f045d312b8978b057a7c04ebc75ba3e1f33934f5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:29:26Z), 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/BCD4N2200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d4e015b5515dddca478fba86dd565123c70464687cf5e01a3d4d2a41036824. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SE6HN2308297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd682fdc949973acf56bb7f6a1cdcb45aaeb1841f16736fba7eb8a4748ead65a0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6HN2308302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d51d152bbe0e980898a64c274bf96d5fab531f60f3db9ad1a396e204fee0888. Chain 2 (Bitcoin): anchored in block 957838 (2026-07-13T10:04:52Z), 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/SE6HN2308303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe691aa8d8e4df1682d0a4262d686355f909fe1dfb66f3747656dd4396dc57db. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE6XX2553101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bce6df4b1632be654d279488270d9ff8af2a2fd3ba77aac85fc0d18f248ee50. 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/US3DF1998712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf33eaff8f1728166af1e6c6ed53709f480cdff868f49971c4823de7b308971. 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/FR9Z62100097.
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