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 0x95f18674b91c64c88d0a347d9d587683dbf6267622653a0b6fe705102c53b854. 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/6e6be9b9-acb7-471e-8bc8-50888b6b48b5.json and https://artists.proofprofile.net/proofs/artist/6e6be9b9-acb7-471e-8bc8-50888b6b48b5.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 0x64129117df6d4b2ce1b880e169dd22f9b8356753aac65547a639c4bbadf19abf. 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/CA5KR2082045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070bec4f26ede00b5d8a752a1987a6928d393bf0e325e2a7f456631081d095e9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:28:14Z), 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/CA5KR2082047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7ddf2036902c87637ac7948861b7f1b611cd6348e3647dff69260d3b4f3c75. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:22Z), 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/CA5KR2082048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d4df68831a2f35754d1c28c5b89f926be3253dfb7224ec75dd2f5e9972a5c9. 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/CA5KR2082051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c27bd6c92baa7c522defe4b9a1b822e6f50002091dda7ba8d48b982dc6d8e6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:05:21Z), 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/CA5KR2082049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eea20b24f83ee32afcfe4bdf5e02614493491838e95f7e7a814b9f5aeaa2b4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CA5KR2082055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfff5754b14230711dc6cdd5e9c4b3d672e085eb1f95276d74713b148ba5a5a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2082050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ae328beb7aa2ee286455a4a263e07151ab425229769cb55f48f10fd7810b42. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:27Z), 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/CA5KR2082052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7317287923a68dcacfaae87ca3c4d44f34dc42716fef30a25ab99be90389ebd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA5KR2082056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eb1791a6583929eb02319af283c56383bdb5d4a962661add46dd39280253c2. 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/CA5KR2082060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa150f31a8f300b35e01a67406aa3874933a996886cca6773e559e84d5fa8692c. 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/CA5KR2082062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132a3a42af0eb50ed3749e029ecd4615dec2f241be03c6b2a51ef2864c0a0caf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2082063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3776b9efc19fd811bfbd42178db82a30e8a4582a37a8295ca87fae877aa08. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DEXN82369618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1344a18dafd46f5e6ebc009a34f5a5a0d49e96f560dd3c23b1e3182b9d07cac2. 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/DEXN82369619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e52ed7db7fda74dfa2f3af4250189d083735702cb4149d126706bf389d3f127. 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/DEXN82369620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4f36d4566f3933e9788917263e98c78b52b59cb190e924f1c23a06b88bdbef. 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/DEXN82369621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba463187203332292570b1434b6f2cbff476eae399b30e15f0e822376e626cf. 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/DEXN82369623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c72c846e7af16f2689f930dc48a68aa536221f88e434a097efdac6791cc73a7. 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/DEXN82369624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8186b17fd532fd07cb92af7f03a53e8651e8608b355e0e6b1aadfbfe809631b. 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/DEXN82369626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6859c610d99b0ccbe9c6147ab2e4b764ea8c5f0aa39713d5cfd66620757a3cae. 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/DEXN82369627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54365b0175c3fe4e6fc815d5cd1618aa6216ceb534fb4d9fe577dfe6849a7c0b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEXN82369625.
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 0x74438edb615179d47d7abfe32e42540cabc2dca492ed52245432db17cba66f7d. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEXN82369622.