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 0xd28faddd3dd01e04ad0aed15240ec544b7784c5a865d93b989df0ea6904f4694. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44f3b030-d1bc-4d74-a8ed-1e863a5fa74d.json and https://artists.proofprofile.net/proofs/artist/44f3b030-d1bc-4d74-a8ed-1e863a5fa74d.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 0x82042efafaf7c73d53c826c581a43567c52f28ba01e096d1164c57e5ef2b70dd. 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/GX53U2452607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0879c6a01c8d9ca2e29e242095dead0a847d151f911c8721f551e57c491045. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:28Z), 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/GX53U2452608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4de0b8aef923bf79dfcd0cc5de712d3540e7edb3d3cf81466c88ae0bc037a2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:30:01Z), 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/GX53U2452609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d7504196982f9874cf38d567b908e5812356da82dced1134c0093f245caf18. 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/GX53U2452610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1fe9a1bdfcf2682d44f4b8cd88e90b644b10a6d6a2803ac0a33b913ec125e0. 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/GX53U2452611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb832a39adbb362d007ede57b89f21c09fd9b98194ce4ff5c43616a5a42968ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:59Z), 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/GX53U2452519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db65612a187efcdf46ed873987b5aa088f73b903ebb6e198fdfedeeb78de960. 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/GX53U2452620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4239a0fa41187eb6f7c660a862a661fa21f422ac8d4935599f1e4869bbc57884. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GX53U2453255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be7faa5e2e9fd4bea658965b65f314a43cdf8d665fd65a8429f05b2ae77a25. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:13Z), 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/GX53U2452520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37af68048992f06da6240506d9814b2003a0df2f17b310a3528b39e2204256. 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/GX53U2457201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0b99acc6e227ca414a97612998aa40090b526ca81ba7b0bdbe28407a2884ba. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:22Z), 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/GX53U2457202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85575da3d1f842045e469e86955b357443341fb36937e16f5990cb9d12c278c. 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/GX53U2457203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbb5f302a664a444df6f907e3bd0e8a1d434144a8559cd50d0253997dbc153b. 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/GX53U2457204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9891d95112dce72654230aeae2225139388fa2c728ffd7b1c170a151c2e370. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:16:47Z), 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/GX53U2452504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b36a70da23a2b325d2372598bca756d9ccc19bc345d631ad1513d3d15cf422. 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/GX53U2452505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2ffbb32aca1fe1b408b04e9ee2fc06cae9103a9712760c4259f295f646058a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX53U2452506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5d18b03df5b6783d09eda00e258e982a70e18d15eae0591361a5b3b0aed034. 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/GX53U2452507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd166d3fe2683a14c40183be34813c0a4d1b6c76663e24727c8e781e2f4e6d. 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/GX53U2452616.