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 0x3dc3988a426de21af0d31c5a664f84231d5e98a9455326bce4bcfc8ba86ef8e9. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03179dbe-324d-4c60-a5f7-f9bfb4f1cc80.json and https://artists.proofprofile.net/proofs/artist/03179dbe-324d-4c60-a5f7-f9bfb4f1cc80.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 0x3c3a60da4cfdec2652a1e0355925759d707e20e50ef239d081479ab672e90760. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCCH9800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54f6ab6390ea28a71923816a47e49e7441f3f646f99ce8c549b2c6d2635166b. 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/GBCCH9700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4cd11171027f0a11c188908e50c2a556b225853d8a9ed616e5c6a046c530ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCCH9800254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67627367f9978c1a54c69ce150d72647c2b6d1d04a936e80c655ad898fd57d0. 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/GBCCH9700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8fe7e8d7aa50f832e97a118f6b04609e136390af9548405024f27e40d913a9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCCH9700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf9e35aeb5f56f2e047548ae675949f3d05b8878b8c00be1c5c6889d9b0dbb2. 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/GBCCH9800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a746b6d095bd154299ea7623c43abb2a55f93d26e82d4959a5981982e42d7. 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/GBCCH9800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc9df014cd5148190bbccf53e9937f5c8311553b81fb07ae14a397077235acd. 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/GBCCH9800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe260b60da3b47d813db81b4eaf738792e3b924954084fd0d4b37e46834b86f99. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCCH9800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141a5f00f7eda13a703ede86761bb81d52c4b41204ebfd303641c19d16843836. 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/GBCCH9800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5327a049acee23a763ae6625a405c31090287bbc6206585d13ea7ecdbcfe2a. 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/GBCCH9800189.
Progression Sessions 1 - Continuous Vocal Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7152fc5adcc074afbc8a992b6b27118eda9a8b20a8954fad26ebba110bc8918. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CHA531300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65b432248e28bf932e655b49191622bc61f80f80d156ddeff811d598a65ca3e. 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/GBCCH0300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e26437298e79d0c5378cb509df7dd9a353a16f43d642dca47cad1f551531df. 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/GBCCH0300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ee2190a8d2ca710341587c77c7f79535fe8291cbea052f206cf8fd257b72ce. 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/GBCCH0300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa625a00b08adb532d6ed41520a74fb1320b09d75e67aba42c9e48c2de3bd7f1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCCH0300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e41859eaabb281f232b2fde49ec157ba8a531b7bdd8ab7ea0e1da70e8e474b5. 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/GBCCH0300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff713affc8ed0b62eb0529246858d33c6bcdc1be1e2b0761ae52f9aade19fef. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBCCH0300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b33de84c39957db7af8272dfbc75cb2687a7195c449069e1d495a52e5827d5a. 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/GBCCH0300112.
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 0xa5c721d757b79a4fdf8152fbe25667ee81b687611a46aaebe54fc1ee1da6a71a. 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/GX8E42200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc7d3c0bfe735d8c1d3e81301d15d0a76871580b39c91c821ec0de412f31a9b. 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/GBCCH0100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb23bd28cb76b18f655352e4330a54e342ab2c8a14002138bd8a4691b1ce17b. 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/GBCCH0100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85f4eb541cb87a0258384cbd74846811fd941a2cbf0a5515f6f056ffceb144. 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/GBCCH0100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e3a86735ddf2561247187d6fb9e3acf8e19f106051becfaeefa7d0386d648. 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/GBCCH0100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd9cc2bf0b84409860edf9dedf092c07e2b3c9ab924d1d23665ac90687335c9. 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/GBCCH0100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60be631932b023553c905640dd16939d438bf243ef6c898b6d276f067dddb2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBCCH0100063.