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 0x55112d9826a08b71ce5619bd6c30d1cd85e95c920d2b239d90c4eecf4be885ef. 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/fd0c1614-54e8-4c0b-840d-8c1088c5a8a7.json and https://artists.proofprofile.net/proofs/artist/fd0c1614-54e8-4c0b-840d-8c1088c5a8a7.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 0x9390f5259730ce627c00388bc735693822063643a89389a916d6c5949aa04820. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:39Z), 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/RSA222313660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b8435f624e9fba9d83b30a6ca23e1b124a50dad2e4e6799ab67b64fbc5936. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/RSA221820152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9402199125bb279aa9d78f2f99d82ec2503a0d6c5d30c9b6667d724ace46c7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:25Z), 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/RSA222313672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e90c49ea17b7e5d638ba8c26881402f13898906be7f8f2da7a6d41681c1fff. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RSA222313674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4db1b8bb1fc74e57d7bc598b084dbf0a48a52a5a081e78e8b5e0a668562090. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/RSA221900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc555ae6982f7909de2a0e83500e1fe7f2a71adaed09e546151cdaf1dc1dffd04. 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/RSA222313648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e511911ce40e6d01a2f45b6236bf505a48e2d26acf1ea7f4de77900476d7492. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:32Z), 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/RSA222010403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb9bb92aea26ca4a78b1a05c4375f26f0088e3e8bd081f5475a333d73bb572e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:29Z), 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/RSA222010613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7263937d9ef71f359625a7ef3c7d1c9769a3d111bf070620beaf3a520294fd8f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/RSA222010614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5b8ffd4efd318f8be9daf0e26458c3abc82248a2f5f0e6ffd22a462d8e9a9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RSA222010616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ce5971fa2741bb02ef49ad4633f610bf58969180424ecef48f063711111516. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/RSA222313650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfbbb6a7e02443ea28c86e921f419b00dcf15d730cf0450cc1c23b37cefd2ff. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RSA222313651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e473f780b9e8bdde9310c98e23663f097c5b65d5d7d6bee54f17d47aaf2206. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RSA222313653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3180babbad4606d0ed60180b19f10b1e9e889f4db604ed402ea2b1d381b27327. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:45:15Z), 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/ATUM72200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44a306180f1383c3b3a34ba9ef0879a5c08255fd4269a2695cda97a545096a3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ATUM72200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa4b7d654eba22c5447898cd0d488fba38bb1e96e2ade1a680bcc3e0dad3e3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ATUM72200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb850ff27a4111e4873bc4471d986a95f305d85aacb0b041f147b628e415ef17. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RSA222313662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6fad4d089a6ee271056a143764ee28018a5bafce01ba2357a34d27f57b5f40. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RSA222313664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8626eb3cbc560d8e0411654910515fe2a6efbefd1c1d3179008129d682e708ee. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/RSA222313668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46cba2940268cf503e671c918c9f26a8f0123a4dd701b07e70d8f9267b7dee6. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:47Z), 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/RSA222313670.