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 0xf0f38c3d0d4fd8311776e6911b47e074afccbe468e902186b0be4ad2d3b6906a. 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/1837609d-2157-476f-8125-52bf5a012299.json and https://artists.proofprofile.net/proofs/artist/1837609d-2157-476f-8125-52bf5a012299.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 0x8dbbce3d13a31212b915174f63ab33c76e693520d4428bb64a5de839a05c593b. 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/QM4DW1533114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936e0ca0233ffdfe3ee639d3d09bf564e718c3fb139c5f9ad797182c0125ef55. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QM2PV1577485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdbfc8f615bc08183a9939c998164cd4b378ebfd9cd8fccce52465aac9c86c9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:34Z), 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/QMPKX1681501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d9bd862550f1160d26335edd6da84ec7a43006e79b412198de3111b201f034. 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/GBKPL1779752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa529473641f9dc77fb3076cc19d0fc5ef390270195125ee0d56b1277e5170319. 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/GBKPL1783585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14752092053253b3ef6351b5b45d96eed35f66d652211a26c0d7945b2e1c0e76. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBKPL1785422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f828eecb4c0bcda92432ecee39cdf2c9ea244362750e08be9187b97ee78ca2c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBKPL1788872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac03548ebea7a983a3a6179a674f372604bfc4747f628404ff46505f1a56970. 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/GBKPL1792617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bd2efd81013a98d95450c701799e37a5ada6c51cd88714396f4151f0626f26. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL1948292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03524555eb56548aa8789e5818b67b747ede88ae8e1b18f09aeabaf118d914df. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZ5FN2283172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597ee829168a1c6f98124a842b645ca9a36e1ad28a022b5778b29ba6708a1f5f. 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/GBWUL2210781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31323d787531e9adcff065d229ed71f8b90bfabe12946b59ac7c1219c50fa705. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QMPKX1615486.