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 0x57a2ff80806419deb5e67efd5509f98db4f995d37d29118488ae08bfb4615ed1. 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/7023d963-5167-48b8-a33f-0ed2f46bdb97.json and https://artists.proofprofile.net/proofs/artist/7023d963-5167-48b8-a33f-0ed2f46bdb97.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 0x2b72d4029162075f37953006e3be925799dc554eb0df4ba2e7355fdcb1fe99c9. 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/FRR642201011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc325924e8411db6008f08284e345bcf859eda3f134fcffb6e1c6720cca719441. 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/FRR642201012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ef6f68c9161c601781d85036f1562557712b4a7d1d46ee2d0ad853173d956f. 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/GB2LD2210094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6d821b76b0c19c49e701987cf0b790910ad84a8ee7318a360ea3cf971c2fcf. 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/GB2LD2210093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9e387ff3359fbf3d376c04992c3c0f4d2ae0e9419ce6a565a7cdfb2a2a0419. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GB2LD2210095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870f308412ed1bac6bca264fa81437cdbbfcca1029eb39dcd236d7146cd20dd1. 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/SE5BU2247708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff964c0cdd0c08f8570945099cec203d584236926ace90b218916a19022c1db. 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/GB2LD2010097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00453be7898f8a3618eaf8702adcb08030ad4ab26aa188fd21607bc00ec71b3. 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/GB2LD2010094.
Here / Feeling (Piece Of You) [Liquicity Presents]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4f166b34f8c2d5a4adcb17f09daec4a8aec6ba5ac6987a7144f01ebb90163d. 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/NLCK41032000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbca35d0cfc4d08e57e02bd0974d033b3d90548011b6e7ad64c5ee1dedca45c3. 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/NLCK41032001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647cbfeb36fa63e592a58fcd864542094707041fe83788a3756e11e272fad6cc. 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/GB2LD0902343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a93b28b9d8d85bc063685049ee4e19eabdb3b37c19350bb9ce2689c93a7bd5d. 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/GB2LD0902300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ecaabfa185ef4204ca1826d71c079a652c14c3164818adf0df8117c95b0e07. 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/GB2LD0902301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6b4b22d33c580fcc8b756975423fe2bdf2cc654089925915bf6da9e0530776. 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/GB2LD0902279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef36dea32813cb28122252282d919349b3a8e8effc9a25e80ec60479ccf9cd7. 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/FRR642201433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4175fcbdeabcc53affac7d3f76b8e1f5ad8640903698dd43958ca10ae17f16. 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/QMBZ92354362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd110e9feeab3626a75a0d2b7139b19bd272e07f3e2958c244482612d5b3a83d. 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/FRR642301138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82e8161f20436fe5657c4417c881568c2d900d0cb64bc821898a08f584cb74b. 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/SE6QE2231433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e5381793620d96895a2c17696b32bfcc75a66385eabef6a501d6e743099a46. 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/GB2LD2210035.