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 0x5d811f400ffc295f77a7bbe8fc770e4f025754f57a15c6d67d158595e6b92d4a. 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/1c9fea21-000f-437d-986d-680cb9fa6870.json and https://artists.proofprofile.net/proofs/artist/1c9fea21-000f-437d-986d-680cb9fa6870.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 0xc242a9a7c71c78e96d7c6a06d11144c8bcdc40b204fca27521c649635a933079. 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/BKPG02400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478c1b91310bda3462c98868ae6797bfa0dbe060be0eea56e522dc3e12afd765. 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/QZW9L2308402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838f97c9ef7c0d414f16cb141794c2c7840a8a400466d04411e716e5dfe5a051. 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/BXZYA2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9709e991362a26ffd7263142bfede3cb77bb4b4ec01d969e9ae4772c8be12ec. 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/BXZYA2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361b266f6535d565d82314f9e3cb44fc3d40570f5f6f69b0f9eed40d1cec3a6e. 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/BXZYA2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5308392456cc23652267d50c2e876141b502adc554ec8272182a55b2799bc51. 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/BXZYA2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43bdb732af5deca2544f120ef88d6fe5faa7f129af709002ef2f86d0644b59b. 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/BXZYA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43bdb732af5deca2544f120ef88d6fe5faa7f129af709002ef2f86d0644b59b. 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/BXZYA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db8a43926d63414688deed729e40bcb207ef4d785c715b08dd16adb9bd0e1c. 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/BXZYA2400014.
Maria Gasolina (feat. astrobeattzz & Yung Drum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb814ac05ca0a922530f8fa2025284156f9d9bd7c66a2c8890ae708dcd4baf783. 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/BC2GV2200001.
Amigo Talarico (feat. Yung Drum & astrobeattzz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d8509920f44fcd1489e92705b53b03ba26ad395a2cca81a927c098b3f1e027. 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/BC2GV2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4bb9f1c71e885bc72fbc509a7afb125015852da2b156195ebdf1f86ecc729. 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/BXIV82450518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a645d8760eda99a014d08e700458c72e462cd784bace8ae279dc46db33a86ff. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BXIV82450195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9246fae319907d8c7145038e1b4776ee4a5ad211a7104e4e5e38ce6baf3e29b. 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/BXIV82460526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0280a049b83dd3513f1a597ce9e5c6612a82f7c7418c19b7cdb72fc3998099c2. 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/BXIV82432229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c32a78d5ead10577baabcc25e8c367ec310cd03220c6a80b6976509725200f. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BXIV82491506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50d49c3e768a26a0cd0f58743e698cce924f25a75228eee7cb1ba5cd523fa30. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXIV82433743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95a606498d7e5673ebad372aeced3fc41754ea05883f90a4f62740f26cb24c5. 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/BXIV82471336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676cb26df46d4641f436522121086eb3d119453c10d772305cbb3767f8b1fe63. 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/BXIV82426238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e7eec7d512a01d635cb4876d5cf4f8dc0fae29bc7acfba5ada1735b40f6793. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BXIV82449062.