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 0xa28e9749cbe8e4bf1deb98a1402c7bd357a4e5a5caab68ce99ceeb0d3d8bd6c7. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e614ab29-d774-4b14-8671-4e0258a5debb.json and https://artists.proofprofile.net/proofs/artist/e614ab29-d774-4b14-8671-4e0258a5debb.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 0x529825d9c9297a039ca1476398a9e6251ef50aad0c4f51412906539679573ed5. 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/ES75E2405718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b1630c47fa0df7896b6a2eb59953fb30d53de49fb1b7eb2a83f19ac75ab477. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:43Z), 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/ES75E2405719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ad21813a2c0159dd1b681fd33056c7bdeb5f4e906a2f69d74c22d71ec582a7. 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/ES75E2405721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058983a5d89a632b7100371c41ac7f0c11fb790270419f9c82fa84648123d5a4. 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/ES75E2405727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0e9e443c61a3003acf8d19592796b29e2817db19345d866b076f1c8f436bc0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES75E2405722.
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 0x60420a3f19c8b9a306695a68f6957d55dcbb7e41404da0d0b0a135c52edd8e68. 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/SE6XW2364271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bcda52f58ae74fdd13275c31de93f6978155f0a561113a3450524dadf20580. 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/SE6TI2328709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f040d6cf319fd8d8b669012972916d01e73fc3384c8175647999249fa15afbf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE6SA2339669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015780462b256fc119762867b9ccd50848bd9aeadbbb4793dfab88389229fc01. 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/SE6XW2315482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b90d35689f98dbf242833dd68275348182530855760b23605a7d11afb244c7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE6XW2397704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d75201171f513f8b02cf5c4f7c691b9f5aa8ce69cb86e7b37a58f98ee598791. 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/SE6HN2472632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0916bb5ee3a10ab20cae50fb7470e126f1eec1825b634576bd4cc5b89c293bb6. 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/SE62M2302801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a0ce64e5b3dde88dd4c2f6663be079b054cf8ff9055e6f7987fff8973425b. 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/SE6SA2217942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ada728417546f04aa858507c6124fa0b86ec4db2b1ce270aeeff05ab58ea0f7. 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/QZWFE2424802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27280f98be3594f17ae35cbee618a42f70e32a06f65d9865d68c6fdc4416a58. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFE2424803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd517480b731685557d8295048657b53e8eef27ed24b0af69b452bfabbff6cb. 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/QZWFE2424804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b8b5bf7d9174e5577da94e850a780fbf0f207093c889c602bfa0f3f5f005d8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFE2424805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5000c8b3c2a99c5053290fd875fafde9a22f566a3b574085db39359ac1ec4769. 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/QZWFE2424807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a68cbc763307c41760393e9394c419a8f8c629a9b40d406670df192a96521d0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFE2424808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbbf1752d4bd3be7fc8264ffa5505567f1f73cbd735f8cb5519e839cf3f362b. 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/QZWFE2424810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53dc7c3e316c750b148a9c557ea831327148fd62757a56b09f741af25c149e. 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/QZWFE2424812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e6ab3fc8fe9d75e4ded19cd18e6268002fb71ec2cb8b248eec77c1b15fbfbd. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZWFE2424809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e4d63df64611212dfad4cce1f6fdb18c5bd6931891a7a1f04c6814592f8abc. 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/QZW9K2305070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c7d1aac94a6ad800fcdd79235302e28172053ccf9ee15e4849aeeb8d262a24. 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/ES75E2502706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fac398e99d92622f6bb6aeab052e79c0cff656dcf275f60a2fcbf9ba364b00. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ES75E2500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a07d6543bb7dba1e943459f787141e10f1194ffab8e7c9adcece2d6c387ad. 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/ES75E2412086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcf5648f5fad6f7fabba9bfcc620ec3f10eb7e115032d0675de08969c412373. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES75E2411424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c0aabaaa182c066c9f932571f773086ab52ecb19c57d1f39c8342f766b7d9. 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/QZW9L2366851.