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 0x081a41b60c1eb9260843f8282a3650b67fc4d22f2ee7b69c1229023b88dc40f6. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57db8474-c8c0-43d6-b412-2011efc51d51.json and https://artists.proofprofile.net/proofs/artist/57db8474-c8c0-43d6-b412-2011efc51d51.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 0x6ae747e6adae00c8d3f2f80daaf7eaae9b211953043409df96f4f425a73841a5. 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/TWI252100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe769b5122c85852a179a2f37f0ee4e08b0c7635875736a6ca7fb0befc7981535. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWI252100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ca9726fb14fdc9ba25ee16932721f00f2f0804e20c5ae4070a2aa591ea1ade. 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/TWFY11900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420a6f206ea057275c3e125d615c3acd5053aee8aab5c332b58bc7cc14e6bb0f. 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/TWFY11900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b909c04edf5fbea30bf023207b1f990bb1c2a98969b634f8fbaa30251414f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWFY11900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d876ee0ce52c0d41cf57a08116ad578ec3520c4e13e16691543c8c3fb4fedd. 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/TWFY11900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12316971ff3692838c1750d86d89af7fc1525385e4996a84f11cd9501e825f9. 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/TWFY11900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e1f2d742502c1411c14117f5923294bf607c2c1616397a1d967e1ad1897930. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWCC32010400.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f6eb085bd80e33ee555eb7ffd23e54882a0966c974858a1bb00434ff81ccb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA451900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd2c7218b7662bb5b49ca7e8c59dad991211fff23e98e752b908e51b7e7175c. 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/TWA472295001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bedbdc5879d4b5f164c2c57e2ef6432943f678170f32ad7794b00b7a931319. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA472295002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca527b2c73c4c95e5e08d77a2d3b4819d3ce6a280cabf326e0352fc3ebb6932. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWA472295003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8256bf8531ed6fd15b28f6e925563235f7d0e67a1108817382e5d66755879d02. 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/TWA472295018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12cc3e7e0f61dbacc96cd309f80efdd6891fcfdd9796ae6c78279e3cbbf15e2. 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/TWA472295022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e3c9849b800a37abc7e09db286eba893c102ebe83e2620653b687a93a3ed8a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TWA472295005.
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 0x80be4d321c3cbdcb50d71073f1b8fc8278cdc2a0b74ef51f76ffee900d47dd31. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TWA472295007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e23dde3766a2bd6490da65452d59781807f85efc647630a2b5f27bb0698dfd4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWA472295013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12213e6e85d8165f4942717ba4cd014dfbbd358384e5bbb328050021bc9d3fd. 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/TWA472295015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7abdc2c52420b52f96f5c21a7100ad5981fb6dde6d8b07d24343c51e0ce26a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TWA472295020.