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 0x482a5e8f4b8adcc5741dd9d6e54357784eb2013f24d1f4a4099c2ac417955595. 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/508f2a2e-461e-4c8f-895e-512e7794f63c.json and https://artists.proofprofile.net/proofs/artist/508f2a2e-461e-4c8f-895e-512e7794f63c.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 0xa1b8ec670e52202a0aa48c411c173c2e5f78803f108907915e516237df7f9d62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMWZB1610970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647c4c208ab7493a8ed528fb79db77b41b552f200fa43246b5c92d481c4c1d08. 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/QMWZB1610882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dad8f5fa7ec7a1b24d5ec8a415ed3d1d305c011609d8dc7823e5b474a21669. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMWZB1610926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba563ebc840a11e683f70e283e0a4337da0b3289a1759f66ee77fbb2bca6af8d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USUYG1158172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d8dbee19bf7ece171f674d094c46b31b1308a5b57346ba95d18d5721b0dfe. 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/QZDA51897050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c2faa27b3e0d5dfe075f8e5813d5b988f8972fb93203adc40378d58323aa3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE6A91809411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7358420732f884fb0198d71ac3879dcc0f083491c349609ff85ce3e38127c3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES91805663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4e146ba1a9823886e0ee245a63c2d713025dc9637b2e23fce33c1487daaa5c. 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/USUYG1407920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0117c7eea82587e729217106da0cff2d18039be9eddf690caee921c59573a414. 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/SGB502391309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6de6eaa25538778eac7115f2ba9a7fe0f850bda44530e8467e49d8e2fa9bec. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SGB502391308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6194313e189d776f9d69604257e5a72af597dda5c8ea3bbccef6b77e2fc7e2d3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SGB502391310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040cab16401d3694c26a699e27f4a40b2983a0e0810fe69420d3d78255572c1c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SGB502390125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8e914e60d066c441bc01ad38877940bd9fafa5a6459e270760cd63f0622b7. 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/SGB502381440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88585054c4b351e2b52468fb7e5dbf515dbff18ba44e47faa863bf3f0b261e7b. 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/SGB502382372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be3458bd77a1b1ddb46bf5c67fe9efddaf4ebdffcc06baa3564e176c193f0c. 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/SGB502252821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aca8948f6daa08ae403a03729f75bbc5dc2699911ab56ea5422ae8b092adbc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SGB502391307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c01bf85311abf2eb1d98a1a9aeb178ad40670291f88b34ed0375094651ae01. 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/SGB502391311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8f1a0f39880188377f2324d7318ea4e3fd4a7427bc216d4fea159fc49d8c62. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZTAX2393217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ade1a63cf0457bafdcdbb85fdda21325e2a6a766066d0541a1fe16c2ceac81. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GXD7V2303975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aaf1e72287fabf660cbfed8119b1dd1b96de138b3b1b73d01423e241ba4694. 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/GBFPN2365613.