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 0xe4317cdb93e42943e8558913044e6848d64a5eac9d138daf5439bbc991465dd6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59e43a95-d4d1-4aee-b882-3d91c19c5fc3.json and https://artists.proofprofile.net/proofs/artist/59e43a95-d4d1-4aee-b882-3d91c19c5fc3.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 0x1503656bca287e22dbed528751d8bc42fcf341ece87a20b871f85f2b80a61092. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBMA22480331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071afba67e523632221a0486efae4a7bf2bc37823b4026b89c966eeefa9292f2. 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/GBMA22353868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cd2a19a0f91f00f93f58fe510a330c5fd3618394b4e342eeab4fb8e6231aae. 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/GBMA22353870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197e502cb94936b50d2bf0feccd4d60fffcd2e7fd1672653024e780bf4af6c85. 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/GBMA22353871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f345e7a12c6a08dbe1e3b36ad6f478522d58c2af4540b5f007ece2654da7b4c. 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/GBMA22353872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3d8f7db49debd3b62d51e910f27f4be5a34972f822d3b984f3067d10999b2. 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/GX53U2325125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296df04a6309ae31d2dcbfdd48ddb85fe253ea780ae3287bcf310a0784331200. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GX53U2325126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5d022b77af58aca8c54fb03feaaeb726af2337d32593be7b4b1cec72aa72b5. 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/GX53U2325129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c8dd88bf3f042b5219253cf5f4e36a734dd5aea8a9e0f870055872d9c5c243. 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/GX53U2326240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef4410bd306d6c56c85c19caaddab093e5a572f10e63518b9d7f5a80ef19a6. 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/GX53U2326241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93822655e851ae9c4cd58bc11f984a3ef26d9911340b00193cbf30bbb8cdbed. 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/GX53U2326246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d328c64faaa777b5f5c56bcf4ee2cb9ad5f92a8a2702c0c77806405c4b1613. 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/GX53U2326248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8350169ea9bada2cb331298adca4b06f81fc6bbf1384c4329eb90d195557a051. 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/GX53U2326249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb8070ae6fe8e5b3eaeeadc26bc96a6866977011271561e6a802c32c2d18ea4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX53U2328291.