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 0xc680e0d98df0cc069a9cacde577988b0580f57f9e163f8762ccf8f328233b20e. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1eca014c-75eb-4c51-be1e-3430eaca6388.json and https://artists.proofprofile.net/proofs/artist/1eca014c-75eb-4c51-be1e-3430eaca6388.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 0x66c9dc9e76a02fb03be3d11e39943b7ec43a87f2c05b21af5dcb3b86461c34a8. 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/TCADS1891565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe101422e936a9e6be416ea12b2a76b4cb1a1880dbeebc898381b1b4c10f0597f. 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/TCADS1889657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bbfeb5f10caf66fed18a42018946e7ff6de0cf5e7c6facf923beb377623578. 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/TCADS1889783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247575efc9034759e8b95bb163bc3b690e2b8c6d71d2842524a8232ab6f6d79e. 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/TCADS1891951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a47aceaaed193cbafedaad504a081422a5d00c9e7bd2e4f656074fd52fbf6b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCADS1889729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aeaa2c5f7ffd9ab6d6717d4b66d7aa31e414ad668fe90096840b09c68da85f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCADS1891197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7544d845dcc199b11f2f6726756a35df00e7e822a35c0af28fb916ed087f78c7. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TCADS1889688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff892da02dfa99bee88599b4f28a956983e09c0cc73f6385fd3e56d93c7cfbc3. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCADS1891023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e4857685a1e96811f9941ec9f318eee172d37251ec85baf970100c2f7c8c31. 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/TCADS1891499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9aa84a908f7f1d8cdaf83d287139b2446878fff52df22c6657182d36adbc83. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZGLS2087533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d86276bb19a7f73e08afa1eb9fb9303ec851ee8aeb407636a5549cf4b9a0b5. 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/QZGLS2087534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e4858b14ef7e81cf342907b7e6e47dfc1193a9ced60e375233a4499bc66db3. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZGLS2087548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38d83272811ff8e3577ac134f0d1c34c7f67c61725968401b3f587a1631749d. 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/QZGLS2087536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3e22990359690e31c564073c2b405cc2364bc0128e403746cdbd27dd1f363e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLS2087537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0dbc214a4b473ca22ed27c9cd5b3356981c2bc3387f8001fe953d28a08fcb4. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZGLS2087538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463abc632990e16f2a376341b41e7a5883b63ba2ff6667d0cc896c95c7835dff. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZGLS2087539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2139cd7d605dfd72ecfb006d82f699a6b392ffd4d51cff7c1f5be033d8650342. 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/QZGLS2087542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd4807354091727685caad9898083743155699006759b0a5c03abc6ff971d4f. 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/QZGLS2087544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb80d104cd1750a6a2980ec2d7216f29b5bc0ef78442734b93e9c923a6d7de2a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZGLS2087545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e09e5fe842eed84762d1a68304aee24205bc5bd2cb30fb114ec15760aeb8e98. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/QZGLS2087546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7164095d0a845f383d68c39a5ff2dc2a466150098ad08c32ffe4959ccaed1. 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/QZGLS2087547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25416dad0df05617333690524fa89e9b0a855a3a7fee41d1ad0a7b6f35affeba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDA62019175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83e0e8e35578ddfb91d17865e1e7f7397f8932cf714fd96f28e9edce4c9a11d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA62019176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78442b7648b87c290c74b236587e6505e6e648038bf5e6106875f3aed6e9ffbf. 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/QZDA62019177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2b6236db94068dbff5690d754dac342268cf994661b506c2263e2d62c46b88. 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/QZDA62019178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f08f874479e057e7392d5522d53977c55153cb36674be274fb081c7b88ca3c. 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/QZDA62019179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8525724aa8523230f03b6593487fb45efa9f71bb7a6f5ac8b95ce02f51f9972. 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/QZDA62019181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44be12c2f57a5a81f8a447a00de396708dde22ca707a30f5b6fae7a454abd30. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAPG1881035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6e8dbb468fe7eebca14ab83333224337ba0adbbb9cf10a97fe724a9c5b0c6a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZFYX1925194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e89dc65cf5f2113fcd92451cca0b306692d6f46db68d35748bbe1fd374b85. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZFYX1925195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb902ec45c414ac1493eb706aa54cadc163f07e94e685e096eb45ecbaf9d58618. 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/QM4DW1848102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf726e6c987b2f609d86a094292b0dcf3c6cfacc02c361a25b02e4416f70ce07a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM4DW1848104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e84d318dc64f0cfe4b9bc7bc1117bd9416f7167ce3a99649ee67a85f0ae31. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4DW1848107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f65e0b6d76074c9865071aeaaf7ded0c2146aa67871560467d73096790cf98. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM4DW1848108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306a8d41f528d41b3841f437200fa6fe189dc4ce161445a7844da36382a199d3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US7VG1807188.