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 0x713bc42e0c856da857df3cfda87aec9999ab99d9cfdae16231c87c807fc03e3c. 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/a689ec55-d0bf-4287-8362-51cff2d0e9e6.json and https://artists.proofprofile.net/proofs/artist/a689ec55-d0bf-4287-8362-51cff2d0e9e6.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 0x4978781f918c0924a89406957943954360dcbe122513e96d549337e64d7a30b6. 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/QZMEM2516921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc00d39f0ec1866c8fc5a22f8e523f69b68d51959f809d48c6187bb190236f9b. 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/QZHN72590814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535a90ea6115d0cc4121bf7cd8870d4350487c0d2f3819babcbb10018152c8ee. 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/QT3F32416267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6acb219330204cda5cd055b4a65b06b1c91d827b66ecb463b66b4570f32a97. 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/QZWFN2485302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a02ebad34f11d538334701f712bf325f556a6a87f7f31b209715bd5e64ae5c8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMEQ2481236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e91b00278a2e629a95a3c9fc5f364845673a24b811fa87ed35f327b256d40c8. 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/QZK6K2417067.
The Ultimate Hour (Leaves From The Vine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf691a36b7db17900516ac587e6c26c7ccaecae60965751f9ef508712a258f0c. 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/QZES62409488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730091b5fe7bb07031b04cc1085e6770b71f312501ec09d0d672732c427a7c77. 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/QZTB62328028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1289817221f16a1e6ebfb12b0f427c26b2521bb5e43524643ea2951f4e8eb4d9. 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/QZNWV2334310.
Anyplace, Anywhere, Anytime (Hardstyle Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6973f46f00e4cf69962edcfd88ff3a1ec3bba15a6206f2a9aa532b5c5af732. 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/QZFZ72303762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a1ba65b5ad5a57a58630ed4148b097f7d76cac65625cf748bb098de3b3ff60. 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/QZFZ42303102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb32c0800f8db83f6471d9de0e4424226b3f308b9e0a70c90a5303ff95ecc67. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BEB682200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d13c2000f3f9438e44db221a4be0257e71e794809d1706ce7dcb13ef19f22b8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNWT2261268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791b31d335e206f8e0db27ef95e74365a5a240a1aed620826f4da370bcb0a6ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES52200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01424d17666fe021c27e137b252e91bf7b681b964d8a319d38b9b30bc9a86603. 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/QZNWT2102067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ce26d7208305e78b4ec9533a0ecdbac58a4ecb8fbacd139ecd5600feba33b8. 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/QZHNA2118302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a4a965a5b45b8a03727098deacf39c7695de80c6cd6f257e3b63be605db845. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZES52197268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39cd384d8ce04185e29715991b0bf52578ed665b45cb72ddde0f8162f89dab5. 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/QZK6F2009747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea894fcc036df78b4375a1dddc7cd0ae69d94bf69079857c63fe1bbeb469fd43. 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/QZK6L2058984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3256ea346cdee8f36818c78ca33e178f17de3b1b66ca20194b43e5ac7f16751. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZFYW2040644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13331aa7be05127b7b3cc64610984abe6e06f0cf2b138e7796c68eb3dc4339b. 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/QZFZ21902925.