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 0x9fe201fa7f32a9c6513aeda32b60a9c5dea646056062d8174076a2cde77adb9f. 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/f075e87b-a510-4a5d-b438-65f5bb2871f1.json and https://artists.proofprofile.net/proofs/artist/f075e87b-a510-4a5d-b438-65f5bb2871f1.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 0xdcc09f2df782f9ae382a0cec1169fd953677299dd1b2d113111c517c51ee2f17. 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/USUYG1494064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c324def6a60daa11e16cffabf6badddcefc6c7a9e971579e400c259fad0a58. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAFO2193624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78ba0962b3573f149c0666d7ffcd3f33228237319877df1cf9c48360787c694. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/TCAFO2193628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac3c8af5f63db359083cae2dbce1206ff011dca5da4d0c28942c6b15b5035f6. 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/TCAFO2193638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2f09344a149fe140421ff6e820bde51fd76950411329d7ddf5d13593964d72. 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/TCADG1794548.
Kut up (feat. Jay Lewis & Ace da Entertainer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d7f90b39a9f020544627dd8ed957ec413bf71be932211f7c22aff8b981967e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCACZ1792541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea12a84bc1db0af7810544af33502284665cec7078c9a04c923217172f1365df. 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/TCACZ1792652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f43934b590902f20ca89280aba614b929c07a58293052d54f8bb42760bcc3b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCACZ1792654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4172a09ca7f157b4ede8fcc14a5e1b04f937b5e2a3fd6bc3b870c299cee42. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCACZ1792662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a068ca9a7dc901d60dc5f5ea2488b55c23bf61fb7b9d66a5f0c64e42e9fa9b. 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/TCAIJ2419235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd918cd5e1ab34fd45331b73f2dacb25cf31404b02ba9f07e139cb6301b1d4447. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCAIK2419266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79910c0b0f27c0a5ac159c47fd74925ce88bbd19ff362ef1c5c93f19aea8e88. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAIJ2419298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fceaa7ba6a814193abb6c0299d66bb61509844d346d0170371eacc2954641f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAIJ2419320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa8ef9dfc9f5ad1c4785be2056211b6644bfcfe310bf5e7e3e54cd978041453. 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/TCAIE2461606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb437ac82dc69a0025cb98be1ed0dafc8d47ad052406a4ebeec0093e3f7f4441. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJW2349654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5f24d64e26879f5de60f83ac93faf04e10df23b206bbde691b64280b3e2daa. 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/QZNJV2384456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558c18bbbe515e306190d59474f0a229772a1f46bfbdd30f653bb05140e9109e. 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/QZGLS2356061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc0e3d23dffc3fb3a8e4021419bb48c1f1fe0f025705d3daccb9aefdf3ce075. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USUYG1441328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cfc6d05cb6b24b96037213e4e38fdd86779ad433ac6ca4ef9a882204e62a2f. 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/TCAFM2163528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9fb829e0fa08600c771e3200f7efab601b9a33117bd3eb88d30db84276af08. 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/TCAEA1850371.