Fleece may refer to: Materials Fleeces, woollen coats of a domestic sheep or long-haired goat, especially after being shorn Polar fleece, a type of polyester fabric often used in jackets Horticult
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 0x68ba85a0f0d939ae9eff2042a81bf1229062510cd2c58f0d06679f35b388c1d9. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/131286f2-323d-4864-9ab6-b2dd869f9e9e.json and https://artists.proofprofile.net/proofs/artist/131286f2-323d-4864-9ab6-b2dd869f9e9e.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 0x37e3037330d447761390885980490ef5a8f0d3a15ad6a43cb137d5f8106a4acf. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZHN52488026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0e43cc6caf78700d2315c6d20df1321ba210b015cbe1c6a270c0621db0e10a. 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/QZHN32544403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3587f743f1c9cf0da4cd22d9141210d0ddc39d74f15e7f709fe00d31c5a4b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6F2581805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8d02c4f62cb2a149fb2ace209236e417c05d3f2bbaf0f5abbe420528a47e27. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6N2465511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ae4e74c550d6a2c14c864e7754f8bc7abe5a9b9c4fbb34faf31447ebde0855. 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/QZK6N2465512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf7f8a1f56690dca7708891f6c7f3908f77071964ba370727c225749a35bc1c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZK6N2465513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841733ebbbd035e0eeb953206459106312a9f94deb81339b505ca735560e88d6. 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/QZK6N2465514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7224155a8577290299c37be32fd1383158c4a56173acc5eae7caa2b53cc4ddaf. 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/QZK6N2465515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4f61c90bf9c947327c61d06145ae9fe90a5ab4176f480e47fd51b340fc2057. 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/USA2P2518917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2562082c1bbab5fc6ed42febfb8fd122d30d9f8e6d5e6a7aa17b452b413f1c7d. 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/USA2P2518920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77cfa27649c6b591798be4eedc15c109fbe4a082dcd194dfb2599e273584e7a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWFL2494103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50f867218d1dde391690158bce1766f26296ea0e9eb797b1aea20f0cbe45692. 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/QZWFL2494104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4127deb0ceeda8df3242a07086f937b45c296d4c3849dba722e1e27d61b166f5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWFL2494105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3cfc5781d7973cf41148a1b288c4c2e25c5427966d1c943a5f9024bb82357. 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/QZWFL2494106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1350a51be803c46062481f091f112c0e42c27d72da1ef30b3102ebd5b075c564. 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/QZWFL2494107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53a4bf31cfa84f3b301fc8b62c745574ef2c466a568b9c4bbdcca25a0fe535d. 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/QZWFL2494108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473621c3c74837ea00fadb350171895c3c65ba09a8cbdd4ebdd21ac077546b03. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZWFL2494109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3506a0ad229a71847f983f236edafc972cc81ce45654880309eecfb4f715e20. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZWFL2494110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84b0c9fa225fabb9cb80fb04ddb92c93bbb74fe48efeba5f1ac96bc71201859. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZWFL2494111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44942d7453980c0e324f03e73eb2b86bd29f4ae8f663f67d9ad414686b3fc842. 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/QZWFL2494112.