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 0x5b066f1230cf4a521fa2947c34a5e3b9daad58d2375680615ef8611d7b695c2a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e550fff4-ce78-47fd-9296-8081f4dfe571.json and https://artists.proofprofile.net/proofs/artist/e550fff4-ce78-47fd-9296-8081f4dfe571.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 0x02a7ccabbc05994444a3674f897261cb2f3d79a997eb9984b0405dfd78fefb2c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGLM1910445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304a26d21ccbf9ab09779ac925b7b2d3c18d234d3f97e45b3dafa36e5fd82ec0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZGLM1910446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd83b15a8f9c138929d8a78a1477becf59f06296d96b9194fdd28aa82a6e8d1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZGLM1910449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b247202580431d8422b8c8ea845aa44439a6e682f2bd7fba45588d35ddfc82c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAEI1925180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2d23f98609c6a7c7c2e00816afd5c0857e664b1157113036a48251a01f2406. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEI1925199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41a309a05b0908dc458b09788ec54c92b424a785e8fbf81280a53419a20e7a4. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:26:16Z), 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/TCAFG2099892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200ce60e119338deb80b81c48f09e4999bd538a2e930b3371102f9d758964f0f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAFG2099937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59218dfc27a380c0127712495e9d4ff65583b2d7fc8adb4b9548f9db16f7f5a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAFL2135160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865153d156cdf034790bbf00bafaa8bc78b57885b5573a13d1729f6ed45e3b30. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFU2171114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56be50ae0a81a17a3988ac4d4db7a28a904fcc63db14d2dd126a06b665eb2722. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:13Z), 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/TCAFU2171131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9291ce08df74ad6be1b9d305ba6ba67cd879ac51aebe7ee58fe061830b44cd2d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAFU2171194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ba9e6403af65ae31f2fc897ea2a9e0bc3c118b0fb10deadb79d9fa99876ef3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZQMB2102149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1671f44d73dc01db22c5409bf6c935f74a056271e36fcfa0c1d3e7ba3f33a9ed. 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/QZQMB2102310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda9a3387c37b34d89a36705da655ffa3977e16728f65eac2f0b3e925eb0463e. 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/QZQMB2106065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdc4216365fcf5efc0733ad86b3c35bc4e8c9d1f137bea382693e1c75ff402c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:02:57Z), 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/TCAJC2485677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8734b62116445189545b64807a078ebe530a4c9b4fe75f1cc33ab999f4e292f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZQMB2104857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59b55358818aaaa566da70bc1589e2e3cde3b1b3bf080395a0f6ad4b65fd08. 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/QZDQH2396126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00efc9bc252e5e982cb26d889f5e2b74c51310ac5a5d75b2f8fb1fc0eb11b5b5. 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/USA2P2468724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b48d839e19373dbe92d4025708a3e645e817c4a2426e660d6b5e763089f457. 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/FR2X41904463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef6b1d9e85fb08a0e85a092dc1885fa0332eb9cacb71d6479d77003b858d60. 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/FR2X41904465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8734b62116445189545b64807a078ebe530a4c9b4fe75f1cc33ab999f4e292f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZQMB2104857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ed9826bcef7477e617197f6010b66849be7c56eb47b6c5cea83e28e0cd8305. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZDQH2364657.
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 0x9fa21dd2ff09f73a94938d16948692f946d281e22ff4b01ed0efadd49b37ffbf. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZDQH2270871.