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 0xb0bf89ad3b77a21daef256996d3210e49be730d109707e39d4af8fca965fe2af. 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/24915e42-2c61-4993-bbd9-fc62fd1d7a72.json and https://artists.proofprofile.net/proofs/artist/24915e42-2c61-4993-bbd9-fc62fd1d7a72.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 0x582db0eacc091b7633cd1c6f1d512665fd4dc20cb0b3ea9ec4d8c384011e0d97. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPYN2112988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb0803e9d935ecc93bb11b8028c4fdc65f3c26a0455d7e765e90b1a74331e46. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE62M2169609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560da4d20afc9ef4cac790523c56cec69733e94ee8326e7965ec28819baeab42. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/SE5BU2226109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056241633e4fff2197aeb8d9e36132d6f6b0225136419f336a46584d0c0bff47. 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/QM4TX2381421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae05a076fe0ab078d741dde18aca32008214c302b0b82dedff60b11b83954a9. 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/QZNJZ2418934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035d638a8273f0a5664c6e5aa7b9af688737be4858759e6d2dde1eaba3f90ef8. 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/QZTPX2475323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d5256cc29b218e2be49879bcd71bb77deb60b3c60dd15529f1a69df3f4ecd. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZW9K2478227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11abd2dfdf771f7603eedad3b6075307f9f06ed3df2942579ac79b3093c10fde. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5BU2516303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afdfec62a13ec0fe35d4accedb213dcb3c4ad8ea8626f96c98c89d03d7c5f6c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/SE5BU2528174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b20f5269080c2c2bb03620d9b2dc748a4be89c2cacfff5ff11efc92ab489a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5BU2528322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb327989cc516685f550e2ca14a4700a3f8c5f70e861e18a96dc11093c56914d. 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/QZW9M2451467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd7063c27928b5e2ad87db5557fa349bb4b549fffee2a98bcb8e73411473dd1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2557034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc211699218d4e4782c3f6c9920374c8fe42c2fad43d8c0ec33b7f7bfcde0fa88. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNJW2556680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f534b83e506e19eb86f81fe18c177934157a979e6309937c3f6e5c25f6ac7. 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/QZNJW2556690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9714d397904932ca1e7d6739694b6146e836ec765f99551158a280c3a2cb0a82. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJW2556688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3d687240befb0943ba05564842f10657fc2c9d36be42a46ca22bf7b164da08. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJW2556682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeb9a826bc0fbf770e9b2ccce0f8e17820c4c6331e9f92ebbe4da00828478bb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJW2556687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e55eee54f3f07d0d69da7cf98e53499e7ab70c134599db47794e4f628fd20cc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJW2556689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2694d20f7857476d7f76540e380b53cddd560ca19c5d3eaa3499c00691d68ee1. 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/QZNJW2556684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723689931ff61fef51bcbc329f6f95c2280d7575dd0c9e80104c677d5041e7cf. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNJW2556692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5686bbe6e0304e339ed70892fd061869b03238a3f6802726baf1d77fa682a732. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJZ2514436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca029dfb7c18d2764a3bad6b55de1d32610e5797ab5191c9c94a7e2975f8541. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTPX2500057.