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 0x34e6e8003a9146c4dc54a255c8f71ffb1617e12dea3646468930aa1e046b5f4c. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0aa673d1-05c7-443f-9866-269c4e88f048.json and https://artists.proofprofile.net/proofs/artist/0aa673d1-05c7-443f-9866-269c4e88f048.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 0xc91b3d6c44f79ebf40442546cb627a2f85d1cb28a5f2f524584a0fc8595c075f. 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/QZHN82113573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc218a3e47d4655b9750c9da37a67c78982280c6d34c993941e7406615c7b181e. 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/QZHN82113574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a5562c2aa49d15c497fd8f1244899ec644d8883ceb869cf1f0453f521ca68f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN82113576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0057ce45b8914ebb4fd0470bc5bd8258cc9ed863d542c2e91fcf2687faad39. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN82113580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9ed87ad501459d4ff11ebd1697af351073437c20f863fe1724ab5d325a0001. 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/QZHN82113583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d23ee994b96f6547974a3a7eb89bf9cfb1e7966706b840fd8aba4fe625fcdb. 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/QZHN82113584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e26513b168d04621af8c561ca2c567cb9c20463e717979296b36695427d230d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZHN82113575.
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 0x9517c52268de49514972aaf587021244b81518d46791286a4cf77bc12a323f0e. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZHN82113577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ee2f5ab873b02468eac4ddf4287bda1aa18e0beda070b8580132f1e450cb29. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN82113578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1d5356f18d17e0a06bdf7b1c98d6ab80a760dae29a6f20a580fd8d8d1d127. 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/QZHN82113579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb7cc0fa9532bbe99e10c113271f9226f2959abc17981ec696017fb6c3c00f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN82113581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e90a6f8d9b6f3a714643281960e4626de8c54eb4840e2e49a591365948f4356. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHN82113582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534a3bdfcd2be6caa5290fa41297837422262b7863d47a2a8087ee573ed44596. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZHN82113585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255a5aedc9849722725ce9aad5e5a9da980b7483d3a1475a9f727d41af5a2347. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHN82113586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3429e4eec07009b861e3b35ae3758ea979d0c1550bb56c3e425284dd71594f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAW2446998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc5bd8d34804fa9f14a94ca502d80ab2156aad2fcfa947b23b950d26c063d86. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAW2450712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ef23c74dc1f2415a097e62fa20c8ada7343b1d8c7da2fdf1cf9dc961e36cb1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWFP2360632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60493ea24f8839b4bc7bad4139fda87f2c462537424e884001f578f40b7de58e. 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/QZTB82283479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8d0d9570011b4f3d7fe8f2dd04f8fb2080cf5dcd08c0d9dc45ac59dfbc2603. 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/QZHN62285166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8df60a7f02194dbebeb79a5afe2039e2e9c7da65c5d5b5e2075d395ed60799. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZFZ72246261.