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 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 0x45bc60f02b3913f9edea7601b46c7ddb80fb8ca04687f9f12ae6e42422f8756d. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebb47035-83de-49d5-91b9-6d3cf7d477ff.json and https://artists.proofprofile.net/proofs/artist/ebb47035-83de-49d5-91b9-6d3cf7d477ff.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 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 0x8277ab8bb5d1f7e706192c31848b9fa973b45d432057412c577b4ced68ae095b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEN2461320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32515fea55a5a56a90ac29a2df50819d38850bf11cad6b3842d3248d766444f5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMER2447823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10cd2d42f2defb55c9ceeed898d5caff49e3e32123a5d064a633c0a47912cb8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMER2429720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9e8311975e7fbf7102f36ba6510c118d918a2ff9e909f796869a4e294f7380. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEQ2459733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8275731b8e069de7b0536324a9112427d4dc1d2149fa2bd64c798e31b05917a9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2490711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5d5c49e622ee0debeaa53fa53a520bacd5c24ac9ae293d8b1d2b746678679f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNWQ2406158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e07f23b84c3057c040a42b8a551546977b8e1469ccbdc49979be28a210ec15. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEN2490612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd63cbd9d32b64be9192939599f8746fb9fe4f6e161042bb8cc794495ff8605. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEP2425333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d39dfe3c6fe8ee3058fa5ae77127b43fe43ce833ff3c935fedabcda9ced0f. 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/QZMEP2468810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d81729ec18e35696f37abbcc9de6924a26182c6f8d00be395352352243ce6e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMER2447003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcda80023c3ee74696b964a886e829b213672b4f637b85bdc72516be8305641. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZMER2458672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e050dca2a6858e05f5bb8b3108c2205350d203f2eec888e118ff03019c0d6f. 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/QZMEQ2402531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9a86ac765ed146f29867a30a64af0ac9a1e48f4a8a00bab69dcbe0093e4948. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZMEQ2471102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e48fc91ef790df7bb83209c225ff58b95f80a3587c7901fd90448bc50e9b24. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMER2407664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169ba1a7c9e244e7a602655912b8205e3e168d4fd943f5b7dca561b62735d21c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMER2437849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda18c058020ab4556fa5b766350980e54bfaae0c5d9c357ae5dcaa2d9471668. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJY2490302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1b4646dc67736fa9c6f0b79f62ee8692061c2d2d35c96f5c2c4bb7dcdcb36c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEQ2478108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af6176b434cb1b53e286c1dc0bcc7b79c93025a4c14fea042ce262ad010649f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEN2406465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa58d5dea544ccc69e715192d87b8e097e2dac6b2c45d93eca12ad6edb2a8d43. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZMEP2497792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81ffd914b4ff2dfbee7655e3aa3d47989350d9e76349669ba7f026b97ca4458. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNWQ2406157.