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 0x40bb1492678df5acaf5749d2817220f9fa26da4cb6231fb577c68e6854e738aa. 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/0532d9e7-3c20-4e0e-ab09-b9ee220be387.json and https://artists.proofprofile.net/proofs/artist/0532d9e7-3c20-4e0e-ab09-b9ee220be387.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 0x2e8dd197eafeecdd4863359007ec02eda61ac1d1efdf2429c042ab939c57b74d. 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/INH102300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5be9341315652c4334139b095a42681283e67020f5181b23f5991ee6853f9ad. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INH102300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536436425fada657fd48dc9791dfe480bf14a94f1945278df722d0bec42eedda. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/INH102300495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8e17fc4031bb6dc41d51c6415dfa2729aa3ca35310dc788f82f8c11aa37874. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INH102301270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e3045a31c5cba5cd905953ccba453c888798494696341c139d5ef9bf9230e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:45:49Z), 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/INH102304177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5c9236c56001124221fe9dec606ff2848e5b92c9a79f0823fe2eacff25b5b7. 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/INH102304178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad86b5f47c6f2dd890628095aaf998869c45efeff16decce3ca3b57b740ecf96. 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/INH102217172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2d73ad21f82390f53fb25c0340daa145a060d3b9c867a3535a7d013586e5f6. 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/INH102216344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f49cc31c40bfe7997aec527a69b1505fd2554caa0cf9dd5b9ba244fee6761f1. 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/INH102216346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353b0efdf4d703577d766e943fd23e04c2c2b487df05b54b92040db231d5ef80. 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/INH102216352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8dd197eafeecdd4863359007ec02eda61ac1d1efdf2429c042ab939c57b74d. 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/INH102300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9229c803aef8d1317d53b1178898e71acb510a1222b7b621c62ba9a2a4726f3. 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/INH102300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5be9341315652c4334139b095a42681283e67020f5181b23f5991ee6853f9ad. 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/INH102300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c609eb14d22f3fc12d2e787752259159139c79bad220a1409bf14aa5e2fac4a. 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/INH102216345.
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 0x92696a16719385b80d6f5b5c96458949ddb03dde381907953233b66f8ceb3154. 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/INH102216347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e4943ff3cf6af56bd6a307f5f39dcbd44f7e79ecad21795ade87d27a08da3f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/INH102216349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a559b6ccf163247670bc3e909afb3f0447c4f4cbe08735cd05a82994438146. 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/INH102216350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6550e5904464d71879074613d960989f8fada110b2d22ed26a5aafc2240961. 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/INH102216351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5324603f28f69f106af0b0b74657700c8bc3288ec58dd473dbc3cf7c6d5b2a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/INH102300489.