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 0x8eed6e1138bb4abace6bb19ea879636090893c26e8487dfad059539ba3b504b1. 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/6d31c4c5-7d15-4ebb-bf78-ddde12151d94.json and https://artists.proofprofile.net/proofs/artist/6d31c4c5-7d15-4ebb-bf78-ddde12151d94.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 0x14b61f2b62b5269282fb09989748e6db54fd42a0062b67abd84abe79d87e9dcb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IL1010900259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151bba5a36db9a88e0f848b10f88481a12f800521bac4b0680397e2528049792. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:15Z), 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/IL1011098695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe468bc328cd22a2906af76344861b18ac9867851be4c3afc5f093c2d2befb0f6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:02Z), 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/IL1011120107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3358cfb4738c0e65eda421318fdf3146cfcef45cc6d130fe6bea7a0881bf4e52. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/IL1011120110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4be7a49e6914256fd226c5148f177ba1d239897b30333672dbe460b2c935989. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:55Z), 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/IL1011122386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeb235be41cdcdf3bcc1a0ec2ab8c1c7ce22529401dc9a716411d0aec2404af. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:00:50Z), 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/IL1011122379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc447ddfb90feb5a31f65f81dc568608472553394319c5b53cd001d8791ff7316. 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/IL1011122388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623159547641d4498f20de4f33c3e1f395780b613b9c435061fd694c50197a55. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IL1011120848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e395b04b1c897ec1c956680e3d3f1fd42f98bfdc7df9c8bb29e38e54e27edb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL1011122327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccb6b58a9cb32d5ad2a6a33b01c3af4e894ba27831d95e07a6d75d9ae8dd115. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:48Z), 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/IL1011122218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5ce2ba22879e77f355649dc2002b03b8ee9f3e69d85307f8a1a396d3d775f4. 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/IL1011122848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd524357071f37e03737662d5de825a2db03b4347416d76c484101517d3074f2e. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/IL1010100782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd524357071f37e03737662d5de825a2db03b4347416d76c484101517d3074f2e. 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/IL1010100782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b6c18ef34c57359877cc67a352fab42822d1df7a5a71283f656952092ffaf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/IL1011124570.
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