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 0x6cf021c0c5a66d3d752d559dc69eef0930322a1c3b4c471151aa8ea2bf24bb1f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd4ff329-90cd-4336-9258-bfd8aeab130c.json and https://artists.proofprofile.net/proofs/artist/fd4ff329-90cd-4336-9258-bfd8aeab130c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Songs of David - A Journey of Worship and Surrender
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 0xab39f7465b30bdea0171f6c85e8a00311a88aaf93e41c95651721a389738bdde. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHM2358524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94f00b1e6baf289482bb74aa182d510024c3bd7f6ad9264fdd9eb4deb029b4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHM2358525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813979fc79101425c86fd544b20a8e969823a45d156741b0935b007a6d9de58c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHM2358527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ed210fcf99c1853d57ae7276af9dfd4de78808365c927af8f27d97cb7fdef. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAHM2358530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf261bcbdb4a546966f6a92a3a6a09ad4f678b0851fbeae16054741367a6894e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:33Z), 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/TCAHM2358534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b890c1bd4ea00e30bb28cc55def8894501a0acc3d089431ce5a3454131e581. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:43Z), 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/NL8RL2525170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208d63f4a7b69acc67cbc8120ee5a6b72d0a7b93dd04969e947397ebffd5bcdb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NL8RL2525171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c03b6df1f513c3be752f5fafb24a1f69d5e10de3d18f9a2a95654094a7958b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL8RL2525172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ff17bf6b9595e86610a1b59ddcdb0dfa0432445209cd83301b447c06bde334. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL8RL2525175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45f9459d8d2938ba7488e0d0828376f61579941b85caa6b3362b9f8cbd8f82d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL8RL2553235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718543b59c7b7891b848c5dc9b556279e3cb22397a809baf63481820c6ef72ba. 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/NL8RL2461349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962e565b08c4e70b514713b092a65c6cbd6a356734b773bde5968871315becca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL8RL2461350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481103f76ccac5f11566492d05e7c8422b1304e8c14047c1048b8497fb57f296. 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/NL8RL2461348.
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 0x67b79c742ba215cdfdcc266201737e60f73276844cb73c28c9bfc69a53be5136. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NL8RL2461351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fad0252d4451060bed723f88cfab0896ce64557222b8acecf4eca0fc212407. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NL8RL2461352.