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 0xcea5052af439990356390db3f5807d0b01b90b7bc7cab8769721dcb16d1186b4. 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/0ba749c5-c9f7-47b1-8461-cd1537026642.json and https://artists.proofprofile.net/proofs/artist/0ba749c5-c9f7-47b1-8461-cd1537026642.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 0x5e2a8e477d5175856bb0fc86d9806f7979133af0cffd478a26dfcbd939548c7c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZHNB1955698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd300aa1a52961babe5fdc4a14af8b29158e6cab0395b03dd88cfd8231312bf76. 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/QZHNB1955699.
Stratil Som Všetku Nádej V Bunde Helly Hansen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b41b8add6090c695d1a615ccfa2efe9f689878b4ed68c51fe0c8049707534. 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/QZHNB1955700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b89defc6747bb14a735a0b5b06187c8e06b2ce3ff2bb94c4b3cb6675d72ffe. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHNB1955702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516562e29236939551d4fe10fb30c07ff939e4e4ac8be0b42beea7efeb5b236b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZHNB1955704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae6946a2bc98ac45783c97f2429278e6670c73141c5c35f7853a2c0c92372a3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHNB1955705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c657955ff23d71ab981b00a84007b452d6f6cdcf7add92624f841acb0b5e2ef. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFZ42063974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed912775fcd1acaa919e6b1b5de1939f7b0c40de40edb8e046d93f9b8b20c82f. 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/QZHN82021373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676d6990b7d4f3da679639cb8d57ef71edd8b3b767e57614c22558e3f57a408e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPLR2036566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e043777bb0a2faa927709f90d38d2aac8e11554417a6ef5d6c710c11375ae0. 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/SKA012100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162f3b0c57451da8296d02869e21e3c5969c2dc96b592ab88befb3dea6f3adaf. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SKA012100279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd658e9a0e1c608c8a7044509a7ed6f3d364f36c7b1bdefffb0ca5bdd5028922e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/SKA012100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3cb7d6574871d265b3892fbc305f39a747f3f556daae5394e7d343f78d69c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/SKA012100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a72a47717b65d72505f9e1efbe3760bf610bb7e9ad9ef871151c831e01d80. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SKA012200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa27c607f8d77bb945ebd930a6448908a01ffd556f5b9f131e17b416d00267f. 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/SKA012300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb36eafe9e54dea7010e13a6262539b2dd7ce501faae7e32a819322024a6b9c. 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/SKA012300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda79366ed2d482e1af1f85948487585d32b177654f3a91373293fa3952ffea6. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/SKA012300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b10f9f1d121eaf78ca1213887c0d79f7524d7feca2bf16d529f0384136a8cd. 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/SKA012300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a89f815479c23843ad7ca8195e2fa6f75d90e71a18706936e4d8a1da145af46. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SKA012300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294f0d3f86a2bef789ccf70340a127f1afc87673afce39612c5f752137ebe82a. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/SKA012300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0af2ea99278c568b271e1b8a507a8bddf822a7246129acde26f8797fe4b3ad. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SKA012300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6e14265c3412f7b2bbba212a53b1c4e8793013a8318643d13c35cd6b39d771. 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/SKA012300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2d15e9d524f0066623cafd1bffb063836e93f6a2425a693482e31f07cb7daf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SKA012300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19d829f9d614d57d2185c29b7b224b907c772471c45791d9e420fa27361866. 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/SKA012300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3808175f802717909ef99aef840f4b24b2ffac62af274b8e3d9f7ddfba95b82. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SKA012300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90188b1d0456915dade9d39bb04a10f3fb20409fe2dc880ae223599224e4660. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SKA012300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00390a62bb04f509d79b9b8a7eca477ec7653c032677e09ea332dd569bb33c2e. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/SKA012300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5e6ed91bfb33b57fc4e684232ea9437e0ec7e5154adc68ac2124ce437b3af1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SKA012400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafd6d3ae674b71ce4a46db7fa58c55474d370d39326e77e42887680032d1f04. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/SKA012400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4968abe0d29ad1b4d2055b788cf24dadde26adeb29484fa59226f6cf8f77e45d. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/SKA012400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a70004ebd214c4ea5e8d308d8bbcbfba925e639627ccaf2c698ec30ae82048. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CZA232200556.