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 0xcb7c7a36268afec268db8f08f229ad58191e2678f18dce16b8d3390f55aabac3. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8185f62-c13d-4b39-a46a-3ef3f73e46bb.json and https://artists.proofprofile.net/proofs/artist/f8185f62-c13d-4b39-a46a-3ef3f73e46bb.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 0xcb3d04ae80beaf37b290a391260f6b0d6cc1aae3e54346a9267789cae609cb3e. 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/FIBAR1800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a81a760d7c849dd42ccb84072eb9365731743e1f558cdb83e2ab698d8dc054. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIBAR1700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ef8adff9d49ed821c2c53e3426040b57315fd32d8e3949751c9e76049ab473. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIBAR1600381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733477c0ee9db32636db8420053d78e350bd762766dca8a517c3f6d2b95af107. 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/FIBAR1700123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cffc68bdf0a3e1bd8e334f35a820d113643385ce7f87f4457eefa48d41d3b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIBAR1800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0398799214918b6e666970955df6c3080610eab0b88fc706bd6fc0dda3918c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FIBAR1700267.
Pakettimatka (feat. Seksikäs-Suklaa & Slim Mill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fe41260b7da814864e54ae31d94bfc273be706c74ace15d22a138877be50b9. 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/FIBAR1800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1ddeae105aa9f2e0860545442159c3aea1a2366ed68c49eec7aef7c0a00d87. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FIBAR1700322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189d6e43e107c7e44396b93abf45c98b1e7993b842991c6afd0680a4b1cb31e5. 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/FIBAR1800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4f435647b6e0bbe95f74272fc2f1c9ee50bc61bbcd1fa94e1bbe3ace06ee2. 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/FIMMP1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d6d8ef3282f95bb26d130a1e25c3619d3d70b38881ee2f81c240f39c9e221f. 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/FIBAR1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b4c747ece9cca3371bf205922dd05f1b3300729a65d841a061594127e8d555. 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/FIBAR1700315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd970d8b3d1cee86dc8c88afe08c5f7fb7d07b82ddc54ab3e0a542a2a73350664. 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/FIBAR1700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8d91ddb3370ebf5eee98df4efee0428213b131d9d928640216179f453a557. 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/FIBAR1700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a290b6fac0cfa0d1000c7df33a51ebfad9f2bdc712c2ec8b76fa79a54383c51. 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/FIBAR1600715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a771bfba7ba83fd1d0596f002471c3b955146b5eaf3aca891e3fa68e0f5e60. 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/FIBAR1600568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb23d5ed12bd965681ca6bc9f336616422f3e15101dc49134bcc209ef1fb2cc1. 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/FIBAR1500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ffdfb17dd6288c67c1be9e2fcfb2dedb758fde5ea018520b0da2716bb2d3de. 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/FIBAR1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1508530ac0582d8ce5c6556e52bcdc65561350bcab8b283246838dfb9c5ea13. 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/FIBAR1400483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c2ca029c518365cf1b17f4a112c606ff75bdc6ab418c78e25093f1d94bb9f6. 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/FIBAR1400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3908508dca0f0fe12c8540b24bc8d99a7c49f23da65573dea755740b33d16a. 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/TCABP1352406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642583abfb87410744e1fb9b9ea5eed1a770e106ecc6cf60fd0ae856442fe04d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDA52409389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dbcd3339e75a9995055dd50ed5b67a597c4a3bd1b7e135525ab7ddb8cbc2cf. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZDA52409391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccdf4ac9e4bb779291d200ce0967d4471ad009ab9246c0a080140476e57ab66. 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/QZDA52409392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63716e438d5b8f42d0dda13c37d9c3a8e739591d9c7f19634f67a5a7c7fd00f8. 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/QZDA52409394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05359c9a5b6b7bb2cbc62c57659bf0994919213622588009e92dff1d4a8f8931. 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/QZDA52409395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86281490c2b3d26e6f81f18d339b22a83a2439e796775ea0b5e15210760af87. 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/QZDA52409396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3224dbe5298028712429400810f854183bf00d05887352961ba70951a7c7d56. 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/QZDA52409398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7256d1da448e41541104ffabdc4157961d785c38a135dfe736d99878bb8e403b. 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/QZDA52409401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea67027a0c5b84b1ce1c04f657fce985dbcaf8cb7d77a94dfc5370427085131. 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/QZDA52409402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1731ad63545a38e9e5ee14ab4c5959cdf8043eb2ee790fb9e53ffb6103cac338. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZDA52409404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1ddeae105aa9f2e0860545442159c3aea1a2366ed68c49eec7aef7c0a00d87. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIBAR1700322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74e500dac0a4d9de6819c1dbef28e3efa910d14b43c895634b8fb1418a0850. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZES51955438.