thumb|350px|Ostinato from Radiohead's "Creep" features modal mixture, common tones between adjacent triads (B between G & B, C and G between C+ & C−), and an emphasis on subdominant harmony (IV = C in
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 0x0f362f6590145b397de30db4219e6b486accc19b0ea031aa477948e15da7e0f7. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a657c582-1cdf-49fb-bc56-ea36b6b7a69a.json and https://artists.proofprofile.net/proofs/artist/a657c582-1cdf-49fb-bc56-ea36b6b7a69a.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 0x6af96578abd7f34247b820536e9f4bcad52c7425c2302f97300cd9d92f71e561. 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/USCA29501785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d301a6d1301d995964c2083d06888037ef41bece338b236e13e52b311c3029f. 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/USVI21100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0755b561928284d5795320a844b6a580099d8d069ddd92e65d6fb0ee54f740a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USCA28901477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb969cea721f0622442d029d9fb0931171cf65e84a1755cf0b567ebadb6843923. 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/GBAYK9100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aa03c3542a33f1f8fd75c8e2a4b21db3ce9366ccb7b20a25e1e0c8aa226ff1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYE9600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70da8e404eb2115d3e4f1ff87525bb74769912d830bb0220de57a5113d2474a6. 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/USCA29301454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bfbe7e40c3a901af78d60d7738284f00a824c79556e93f3ddf7de59bed96ef. 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/DKABA9721701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3a35b54ea4ab0026c04534465b6472bac638132678a83940e380ed7d3ae254. 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/GBAAA9000447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d4a9ed400fcecc6b6c1655ea01434a1be6ab60680960c1b02dab0962b58a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSB29000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a9dc051844a80bdcf262ccd07a574a1bbb53a0cbb0b92898a1ed182cf20f66. 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/GBAYE9400154.
All That Glitters Isn't Gold - Pop Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb4ed8386b5e1c9a373afe40a79161639b6f4fd2bb37a1d31d38ddb89325cd9. 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/USCA20705169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2007a43549f243b7bd1e561d1cf0732213484c4fe605539fb83321c77236ca28. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USCA29101803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d03b6ec7d83a533b8323fdfedd0521ebb295d85fbfdad543417023d4c46117. 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/USSB29100196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc278ed7a93713ad96ac70a347bbfc05c04b71006d55740f28c4a13ea173c5901. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USBN29400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdfabea3b225afeb522efc6a9b78e47fff8cc5250f9581823b7b06182906e0e. 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/USCA29502146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d3a101df46bc0e4d75d3fc7b894b685bc4543f32ae65cb9aecf1afbd92bda4. 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/USEM34900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250549a781faeb895db3f565c67049c18454425f737bd0e42627c6a1371e71bb. 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/USEM34900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f15a7116ec9d0e988f04a47af47ce966281a7c0b933e85a6b63ec11c51ba8ec. 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/USCA21000706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db2eb7df30ec6884b835e62ca7bf8dcfcdbcb3a96c205488126fd319f2cdb80. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USEM34900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d03b6ec7d83a533b8323fdfedd0521ebb295d85fbfdad543417023d4c46117. 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/USSB29100196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168a60f4b914e3aeee33a95e33f28759e45fb2d849779dcfb731078d64831cdc. 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/USSB24900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e80fc35069b850e0e7982234ba1bb2c6000b29369f41bfb3b77f824c88cb5bb. 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/USSB24900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da07123f38906a85d1e84fc085cfa0597cb05d533debb2a5bb637362e1bf325. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USSB24900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9137e4baee45a058d8e08322673c3a9d5120772b856e3b3c658fb8fcb223e776. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSB24900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcce5c250ccdfcb23013973d36eb7d7fca98c2a5bd7a08f0c4f5f2afd8d9bf9c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSB24900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cec3364cf2f709e7ac21e6e45831c39c2f44a65a8c4dfeecb6f884ed76bb5d2. 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/USCGJ2465339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f9cb2c0cbeb50c1abc0824a6bb7e64c5c0537827869ea5b06d7308a54f3cb1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEH1944010.