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 0x8dff42409e180bafb4f6b9491b1f00cf23e20197738f7be511de97a9470486b0. 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/017dabf5-1b82-41f6-8fcb-91dd35e661fa.json and https://artists.proofprofile.net/proofs/artist/017dabf5-1b82-41f6-8fcb-91dd35e661fa.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 0x5d1de2c869df5f96f9053a6428473f01d353dbde64394b74ecb76d68571bf742. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX201912444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c174c67667421e81cd39d7080931cfa9440681b6d34a07606c9d9fcad6c03f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX201912445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92003be1a6b740ed010bd967fdebcc8cef6dcaf5eac20d23a6199651b062bc7c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX201912446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db4cbfd647ebfd50e65cfca47931cb24b223c93c235fa2c391d3a80b0d489bc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX201912450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d81575ded33a208d8ce3828d5f0a27cc629bbe3c194568f0559bef7cb2fc38. 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/RO2MS2200715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec7f5718c3887d8c455fc9a2b592c41c9ff04d61033db47e917925772e13d6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RO2MS2200716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eac9d26f323907dd19c5a74f901a8d5950bd7c3f9e8b44613b6bfa467181823. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/RO2MS2200724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183a4a281c596bec2e3ec3b29952aa5ae6bcc6d561776a40aa82a26d9fd8b6b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RO2MS2200727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf313226491d04093e5196d1f3682ab8d391978f71551e6b8b345407b05f852. 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/ROBRA2300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ec75ac7287c89a65de59e2112716c92dd26c56be0d16b196000b3ced5c06ed. 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/ROBRA2300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d605b17e5a91342f563413a2d100b545e7ed3358ef570d039e23bd7295a563. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:05:35Z), 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/QT6632568278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17fabb7c4bed9e21721b0fe506d95fe9d0aacbc6442bd83ac587b715fb34a8b. 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/TCABS1319561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6634d8c21ad867b2857061e32ed44fcbf41c3030495425feed749d9e7c0fec. 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/TCABS1301265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5749192c595c9a7d2ba344d98256fe45dd8deca2635f3642675790b30484f67a. 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/TCABS1301266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4532c5959e64dc38d5e23985c381c7a659b3012ae0443cb3363497f07ed852. 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/TCABS1301272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f212c25ec16c41dc0f5b8f106805ce9758ec30d254047a724e0e24d81be447. 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/TCABS1301276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d8cba0c8b216e99d9338b061ceb7843cd29f9a409b05cfc76a9e1c2c67b6d3. 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/TCABS1301277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407a107ed36e2828776ae459a9ba47d01174e613eb4a2baf6e4e133b270551a3. 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/TCABS1301268.
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 0xf83cbb3ab93f966ea857cee3eee2ec5de9da0d58f9d4ad6df0d3c698fc504d6d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCABS1301269.