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 0x534596aacdf4e370a6084d97bf3f099643bd39605f246eaeb72d4f5fc22abeeb. 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/95ccb997-c77d-4aea-838d-fa79f1d4541d.json and https://artists.proofprofile.net/proofs/artist/95ccb997-c77d-4aea-838d-fa79f1d4541d.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 0xa14eff88b8dec81bc6e363bd31c186fc626228be7d84b75785beb712b6ac10d1. 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/QZDA82334904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a6479b1910e0ec2d07fa247acfabed605c2b7d345a05c46ac6f2b9fbceef88. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/EEBF52300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318120c56567bfafe931d66bc42a67d6fbb7e70ee0e6ecfa7dc5fda0fd571226. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/EEBF52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc83fea603f2f40bca1c2a48243f6f3a96fea0d2d1e51bd13ce1001a689fa78. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/EEBF52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c308b0c8f63f98021ee833aba009767631abd66364c7063b1bb7ca9f80bdb6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ22373770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bc9bc02e3756657a7ff8ca38fdab56682ccc8b9c7e45787f50c1f1e93a4521. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/EEBF52300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63374a99ceded10fc3fe050d66fecb2a26dbe2b6b38b1a047d82fa33716e1ab2. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/EEBF52300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0c3d7622e4fbd7c372bc238e68cc0e4c61421da3627b5e5a2569b067baffbb. 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/EEBF52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0079304a20670444c3eeecdb2340df8d9386bf6b21d4c9466a39f1d52849fd9d. 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/EEBF52300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318120c56567bfafe931d66bc42a67d6fbb7e70ee0e6ecfa7dc5fda0fd571226. 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/EEBF52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6480d43f6413d424c6ff71950872dfbc1d198f7dfda90205f130266a0b6d397. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/EEBF52300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8604126e1e0544b2347a3fbb9437abc7dc086da94cb2be64087524be5176e93. 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/EEBF52300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc83fea603f2f40bca1c2a48243f6f3a96fea0d2d1e51bd13ce1001a689fa78. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/EEBF52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c308b0c8f63f98021ee833aba009767631abd66364c7063b1bb7ca9f80bdb6. 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/QZFZ22373770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e520d6e975390c89888fd283a4f5d63d00be3ba9ee7eeff6851fd7b20e981. 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/EEBF52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bc9bc02e3756657a7ff8ca38fdab56682ccc8b9c7e45787f50c1f1e93a4521. 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/EEBF52300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a6479b1910e0ec2d07fa247acfabed605c2b7d345a05c46ac6f2b9fbceef88. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/EEBF52300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fbe33862059b6579bffddee0e02b2c273a841bf6662c7e77099dcdb3c048c5. 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/EEBF52400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d90f8a82e3502fdadcb0f367b667e1c5e59e9a8538b09e23611412eeb40c61. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIUM72100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c533c6bb070893e2f70d92b9fc4841bb6a7665348ce394801b24c4d58b3557b. 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/FIUM72100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74916fe8e88e3a1a44b65619be4ab0d72d8b4c0005b8b7b901e71274d2b7651f. 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/FIUM72000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0adf4c24ed6710aafb2d024f070f57f35675e0094cc8087d191661575b25ed9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAY2352389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94768767d286e92718a58dd1b93bb70e2cfa34a2e2440398617da6a9675f3ab6. 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/EEBF52400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cb1801964b9dfd9bcd457f85b8412eb5668f8818b6d3aa0d9be1d803d10342. 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/EEBF52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607021f9305507e9ba4ce34505baa2e715bba7d57adc0091abece67a4827646. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/EEBF52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600e67132bf30e64a8463a5ac194ff8fe1e99ba0ee23b5f6b94732517bf446b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/EEBF52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda034ff9c58356264183a9d22170e58a0e17bae000dcc18a225ef3dd44b32c1e. 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/EEBF52400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598d6dc12579ff99dd92966ab46ca2bf26b7f7e01887d3c25e09c19cadaf2c95. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/EEBF52400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45316aa6bd88914b26ecfb3624c7b82e43dd219eb92c9f9ea28d64af29ed353d. 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/EEBF52400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dd99804b91d460b9448338210203fbe5ae5a5a19dfd63dbd7db9152a8606f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/EEBF52400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259cdf1498b4a25de9a1ca6983dee4c210b89e97190402719d6e6bc3b8f30053. 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/EEBF52400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0347fd9fa2cc5e78399724cb290ae42ede49cf6ae13dce72b8467725471dbb5a. 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/EEBF52400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dd99804b91d460b9448338210203fbe5ae5a5a19dfd63dbd7db9152a8606f7. 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/EEBF52400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cb1801964b9dfd9bcd457f85b8412eb5668f8818b6d3aa0d9be1d803d10342. 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/EEBF52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda034ff9c58356264183a9d22170e58a0e17bae000dcc18a225ef3dd44b32c1e. 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/EEBF52400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607021f9305507e9ba4ce34505baa2e715bba7d57adc0091abece67a4827646. 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/EEBF52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600e67132bf30e64a8463a5ac194ff8fe1e99ba0ee23b5f6b94732517bf446b7. 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/EEBF52400005.