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 0x6c70a7e8b462c15a806c97decf46526290e71c7b9c2d3fadee3ce3a3590d8773. 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/ef4f2ea3-d1ab-465e-95f5-d791ed17c2c8.json and https://artists.proofprofile.net/proofs/artist/ef4f2ea3-d1ab-465e-95f5-d791ed17c2c8.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 0x2c78f4c4d44c4657917e33250bc0b9ef51fe0ffcf6651706fb37750b27d8d7a3. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM6MZ1756594.
Olivia Nelson 'Hideaway' (K, Le Maestro Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9a739371e63b4dd89fc31a11a0e390b2974040c8f8b4c24eaf41fb2369f200. 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/QMDA61812488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44549108ea7e7e3d276ddf17b2251be669f076eb4caa5ef4c5cb0ed0905df69c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM6MZ1874928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c065605119719c6d2630a84e66b4ac137b1364f1af6a153257fc9ad5ca34584. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM6P41815333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe271fc0138b9693d9c642fe38cb5590a0d8987039b5a2649ea51af959fdb7013. 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/QM6MZ1994457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786167fec43be7ce105c1964709cf03b47a3c4f9aebf75600e028386150cebe8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX452138956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dff59d201af87e1be5d6b1e89c0f5a0a89758fabc4f401667a521b0cd241974. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR59R2468169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165ae16933b7a9bf78de8fd76db208f7f468c249ff5c376c8a3ef1bbae48bbf5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRX282157597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308e09127c56fe311c0581229b7e6315130cdd86cfabda295a58292f9083f5f. 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/QM6MZ1726906.
Someone That You Love - Franc Moody Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d10c8796edb4b336610513c58d96744bce73dae0ef472396edfe04c15b9893f. 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/QM6MZ1726907.
Someone That You Love - Oscar Gold Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c36a13aa69e3616c55240dc2ed0fcdc7066c98e67799dc04020a26b8e75fe2. 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/QM6MZ1726908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaf4f70aeb6db0f448551767190b6dc18cfe9f23613e9dff2be15d109582784. 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/QM4TW2010289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d27693459927339724e4e7366162fb6468efaf942b76b5c17f4d205291a7beb. 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/GB2LD1700288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7cfeb9eb416cf3d7d1cbe2f2b5934c55bce4d9639ed031cd812894a4c20112. 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/QM4TW1798589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6acd3f1bc4163055accd4c05674f912dce4075b58c961e2346333515e867f73. 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/GBPVV1802373.