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 0xabf4d42822c16580b383952cddf5903eaaca88a6579eb70e2123c69e6c35453b. 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/797ebef1-641c-4627-b7bc-63f4e7345ba7.json and https://artists.proofprofile.net/proofs/artist/797ebef1-641c-4627-b7bc-63f4e7345ba7.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 0x397b890abf1c3fdc48521f71c34ae22c418308a883372d9a08f2baadd9d70651. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USV291428786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f42690859d0ece43ca54df561643e1506057529ca3ca8765c142f19a64fcd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USV291428787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aa81e8ebcf1af9d5ddecdbae7aeec9d0d7dafa1413cd71cba52fa8e8a30012. 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/USV291428790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182430b639b20822c856f1626b837689b097a0e17762c766812a02fd1311db35. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QMDA71497474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3d0c1f538f94d37a9957ca788f0e37175a0ed875ded71cd3f2836da6734a0d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA71497475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c892caeb4067ba24d409b64beb2d1b6408208d6507d247b295ca7aadd5a1e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G1515236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810c1265ffa76e25d4c00d995c92c5e2154f7a94dc19194f558bb5bdad8ef001. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G1515238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d88087daa257f0424f636eb3d1973604afe41731aea2cee787b8ecb25a7140. 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/ES71G1515241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7407f973520bb4cef1e81e7a8195053712e8b50e7355402f26a47525eee28d8a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ES94G2170001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61b461cb7f541bc1e46d47a4ccde6062c77a941b8f800cf6b9677f9370d91c4. 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/ES94G2170004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d674e062848af12db7dc53ba8b9460ed21e7d949b39b11462ee4dd69e6a12b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES94G2400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14aa25c5cd38933ae9b79d98769a34ed0745fa7a255f4410b41cfed115786cd. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES94G2400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fe03c58f65960e1520f9f125210453589740ebfd79b80529c18b50f98b8ca8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES94G2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab13a9a057b0161e573fc5e24a1f1fe316347a2674f3a74687b25a1f4ff54d0. 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/ES94G2400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586b4f8f10bd41f466e612b9522edcfc6efe67214315f517404f6f718ce994f1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES94G2400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb813a4a5dbb3a6a35cdb2c128c1f492f38ba45df05ef245bd55320e305ae0ad. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ES94G2400506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e33d0f6fce3c9453f87ee0e027024967d91920f80e8fb3d7723e7467dc3f15. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES94G2400507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12176caa5bc1ef578b07ad20aa8c5183d50ab66b40b0e8bfc5fec5234c4294d5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ES94G2400508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974a8830973ef78187c055ddefbfd79a0f7f53557b3f8b5dd04f6cb8c3fd2dcc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES94G2400509.
Europa Huele a Muerto: Homenaje a Flitter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55952b2992d42443c057bed22210042511d2335a8b1ac89222b704af3d61e3. 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/QM6P41873381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d25121bb49b98c17e0a5d725fcf66d39b1168c46783ce19a4ef6966ca778d. 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/QM6P41873382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9b033f50bd6ff6cbaf60371bb746c472b192c6ab76376eb12a79b2c903b222. 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/ES5152200030.