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 0x88567f9808ca8165fec3e0aa9cab68942fac4513d5d40e11fc3fc05b5cff57f1. 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/8bfd56c7-1140-41c0-b3af-627949958dc3.json and https://artists.proofprofile.net/proofs/artist/8bfd56c7-1140-41c0-b3af-627949958dc3.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 0xba4fcd48cbdbea138baf6ca717d058547a8c3fe882224ae69fc1f0fd7c09ee01. 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/CA5KR2367358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f12299611db3e901f6acd4167cd569930ed8b171c157ac5bbc12b30efc55113. 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/CA5KR2367359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b2af73ef647d88f259e9ab6f708ff65cf6eec77b0467f0bade012c4b9e417c. 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/CA5KR2361310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd68a7c729ceca4ec775e143e52011eed48c8e327f6b9f64d008912164132660. 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/CA5KR2361308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7dda73584f67b199e7621a4aca954b310bcb42c3a12126c31aff088992ca1. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ES61A1600727.
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 0x3f79918f987ae46b1f8051a77b7b2de648509ad58e7d87ede58ddc99fd31d90e. 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/CA5KR2361305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef98953d52d8b994bbfa577662e506031027c481da77283954a8fce2569c00dd. 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/CA5KR2361306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9f46431f7abee3c1e6aba81adf2301a3dcc15f91f15b1bd08bf4bca1ef169c. 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/FR10S2053066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdbb094f197e6e8592198449541fea167f417728bba0461211e71bd6e8247c3. 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/QZ5FN1970738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423ee205ecfb080ae234ac5c2682f706304d6dc19e403c1ec6a7a7a4dda1d764. 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/QZ5FN1970740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b899d0be3dffbf85da09c7748363499ce651a74af7af01f59da07e7d4e831. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZ5FN1970739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f990694feb972b879b001ec7d1f4db625dbcce0290ee458bab6742e04d2563. 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/ES61A1714681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91433139bcaa829227c40f3152d97cef75643b63ff3ddbeb1434bfaa9dda4aad. 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/ES61A1227620.
Poka Plak - Jus Deelax, Ferran Aguado 2012 Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143cc88f0762630b1b0a325c8497d03c0d7dd4a6a59ebbf5ff329cc24580e49e. 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/ES98I1203544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db47be69ec69daa65bc1945c4bc206412092a9954e0bdd53c3e8d614dc00276. 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/ES61A1222101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd4b432fb129d2ed7d514fd2cd3b6af2b12dcb20504d728372a22aee65f1a58. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ES61A1215701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f85b0ebb02d638c6a32cf31231128aef960c057a9c7dc7b262b8fc1985855d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES61A1227616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8fe60bf832fd3af4446ed4817a4bb45223c6a21a133902393318556b3c8a5a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES98I1204029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162995517e8a5da0ff38fa0c1ebee4f99229a28eb36fcff97ae804af8777efb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ES61A1218621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7ca4d4a47f711f0ff205c6837a3d52546824d9a178a0d6da1f849ad39218f8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES61A1227633.