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 0x89f3800c2dab650aa00d84868aa0863263e7bcb960b0201962879c721bf790b0. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbb4bdf7-680a-4c27-ac51-107f06136329.json and https://artists.proofprofile.net/proofs/artist/cbb4bdf7-680a-4c27-ac51-107f06136329.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 0x62efafd68a0094e8c9d8c9bc63abbc0257c665d7603b38458757af96db623f89. 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/GBJ2F1011046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0582259235ebf4f5b997065187ec2a8bbb7fd660aeb30e8543d73df087d412aa. 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/GBJ2F1011047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c2b6db33e19bed5e2758c0ffa6ba0277ad224aff4fc372e9ede91da25db20. 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/GBJ2F1011048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2f6c017198f3f2dc93223cef8f93cb14e0e43f978ba7426842b7075d3c900c. 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/GBJ2F1011051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f24b240f1cd1df007d24e1cf64f68cbc4a0226eab7e6ca507c72f33102f002f. 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/GBJ2F1011053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cf9433b2ac6817f887fe46378cf645b6af6ac0a2c3da6fa9683a7ba7729dbb. 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/GBJ2F1011060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecc2dc6c73195dde24f8ee8e281826d80dbddef70ccde489c34fd97426c16ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJ2F1011061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33583bc80f129e19d61ff8eb49c50c5bb8848756814c260aad6b298d0677ad90. 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/GBJ2F1011062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e12c2f59930096fbf7829ac617440e586cb2ad29072f3bfdb57038b0a8fcc8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBJ2F1011057.
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 0x72976d59463cf180dc5a646e66226efd5f46d4b6b8ef9353a2dc910ee39aa1fe. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBJ2F1011058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3c0e61f8bac3b09ecb5d26717d76b2e6d04db7084a42414b63d98accdbb2b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBJ2F1011059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa90b73936d846909d79d8c88167dd2aeeddc142aef95cb3d9316c8fef66575c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBC7N1046708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e1b2e7f55bd7fa2288a26daf70c12cf17c7dd5a370dfa4722f386d33c65d41. 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/GBC7N1046716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00ead503161899cff3851ebe553d957e76c953bb9deeb7675b2ace73361981e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBC7N1046709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071e362e2ebff482be6867eaeca4b88fca98dd1f41cbe45cd44e9fbbfcc7cd5a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBC7N1046710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b4e6cc6134c3e3e5509bcc9bee91d86afff11db7a17f8dfabc6f0809e37e52. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBC7N1046712.
Organ Symphony No. 5, Op. 42, No. 1: V. Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e1b2e7f55bd7fa2288a26daf70c12cf17c7dd5a370dfa4722f386d33c65d41. 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/GBC7N1046716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f8551eafd3e796c74d9ca072b5a7ec7c280e93a4e9500445beeb86f00f9a9a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBXUX1105811.