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 0x321f4c3cfae32f61592d08f8e31a40ce6c0af9a8f62dedf20b376dbb46c72da6. 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/d20c8223-6f31-48e2-a851-b6317a16d887.json and https://artists.proofprofile.net/proofs/artist/d20c8223-6f31-48e2-a851-b6317a16d887.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 0x14bd53fb1f9874eb1ad6335cede752ab866611ea78b796001623561d40e4dc54. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BR67K2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d7fb8396584f1aead31f93fdaf30f3679f41b11b79ec16c7234f11e439c07a. 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/BR67K2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf155d3aa9209da26fdd9f53e30a628c25abe9ef5cc9a31f8efd627b48b7df. 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/BR67K2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71deb2c3d95eebdfd95b10f4e44c3922f08dc71667168791c76010a3b8a0660. 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/SE6HN2010650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7623135cf4f7cbed76f602e02b9a52c8bc6bc065d193631889d2f1804f631574. 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/BR67K1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eeb7012243079eb4e4a0dd4720a2f6a3c326cdfba2c14bc6d9d7388ea44c66. 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/BR67K2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5664677c0bc5d068fefd681015773bfdf99d67f7169a74caa1e4d07f4ebf29c3. 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/BR67K2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7840a5cbe1d53e0cdad38e4031b835511c674e008133f56ad47807164ff62280. 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/BR67K1900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9377343fafa6e37b1cc050c182af94bd64a1021a7015e29866218a8a604e94db. 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/BR67K2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e0a7d1a2e1df18e8a6b5abf5fb77fd577c799ee515e35f40dd88a4c2831219. 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/US7VG1548364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64618e70baf3af71b3680adafbca9bd4476f8876d53ca50915957471b876d17a. 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/US7VG1548365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc553027fc71d5938a1cab830db979be33889f058a5fd65b942e48b2c1d9dd54. 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/US7VG1548366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc5d3259dde916bc1975ecbbff3a310961faf3ed8bb71c9df7900afaed856e0. 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/US7VG1548367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4776ac0563ac04ccbf1a02b782cc784e189abacb42a959bcb8a27213344e9170. 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/US7VG1548368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0dc7fd9b6e70324594aad02bd2eba229e48aac67376a1edad10d26dd52df16. 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/US7VG1548369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf98ecbb0d1fb2d9fafc31e91c81406320235f22b6d9cb0d9e7f78ce7a0f65db. 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/US7VG1548370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34d128691cde2f9b37b2d181ec7573397d6def2ffa39dff06d98531c895349. 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/US7VG1548371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43786e874a72cfba529d94b6e4362a79483f3f144544b6b8bc9cdb4fae3540cf. 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/US7VG1548372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8632dc73af91885fcd8cb27824f83a10acaf71514c9ea906f36030e77437c793. 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/US7VG1548373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30ccab65c3d967fe823b985eb9f148cb5abfc9b12f4517cbe99578fa8444429. 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/US7VG1548374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cfb2efc53255437016448a23a5d8733f77878c12f29cf465c14caca7fbed19. 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/US7VG1548375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0512122e25818cb75e7120d5af62b55059ed6d885546584664dca97ca3950a5a. 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/US7VG1548376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df9f0b16e1c3eba336e11242da00a97085643f0d577f305933d7d2bb2f7be92. 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/BCFN52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2377ee04e2a0065dfe80d8248382f41a088352b2ea1a6135f12351a5af33293e. 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/BCFN52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6656b306a09004ceb916fa8160c751bc32de922ec4b063fdbbec66ff3fa27f. 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/BCFN52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cfa92b49be9f6d86a7bf44ec16671e62165d215912e1dd0a6357e27683cd83. 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/BCFN52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b18b6e919c23491286b5f9de803a81287f1b1ccb98dcef273ae05b8d9f2dda8. 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/SE5BU2293523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7119161cd5f3f0f61deeb9682d1e199e866a59292516875668f927bf3139e81e. 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/SE62M2122857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eeb7012243079eb4e4a0dd4720a2f6a3c326cdfba2c14bc6d9d7388ea44c66. 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/BR67K2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71deb2c3d95eebdfd95b10f4e44c3922f08dc71667168791c76010a3b8a0660. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/SE6HN2010650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5664677c0bc5d068fefd681015773bfdf99d67f7169a74caa1e4d07f4ebf29c3. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BR67K2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7840a5cbe1d53e0cdad38e4031b835511c674e008133f56ad47807164ff62280. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BR67K1900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7623135cf4f7cbed76f602e02b9a52c8bc6bc065d193631889d2f1804f631574. 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/BR67K1900011.