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 0x416bc4a9637855476998e176814cf2b215212e61a4969298622ea065a6242176. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43196d13-639c-4ec8-964d-49499a11ce31.json and https://artists.proofprofile.net/proofs/artist/43196d13-639c-4ec8-964d-49499a11ce31.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 0x8e5e26dc030ed418ebc3a908b54d36fb37a3d595d74fc530f2a324f24c408825. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA012217278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6412b168dcdeac781de083dc3bdcbb27e45083d2a3a63631df69e566faa6a93d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UYB282374007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3cca62de356cd7978dd6f90e016e63350498d23088d4685bb42f21ffed636. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES75E2400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4ddf04c2bfdb4b23c2c9a18e196eafb6bc3fb5a19d2d192a30b93dadb77ace. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZW9K2310039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54136da42dbf03387022e79ea221a7918c22761f2e26512806e1ea2d5f6ce35f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA092317728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c8b73593b3da93583a7491cae5bef3bdbd6afd3ae5267dc4a20de2f906c5c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UYB282374006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d615e7023b1115fa749584a2821e0a210c825e42730d5f67aa75eaf847356b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES64E2300901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6c6f8d9deaa984963df3287652c6543572519542dd511122e8c869938b81d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA012235526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1fcdfd1d3b87db47d4d3dbca523462fa1c1811a04b3133601cf4a408760857. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA011535542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d26757a744f0cd25d91ae0cae11f8c086c637c395e3d6af8d5218da2b863837. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA011529956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775680efb67d638bb4b25237b2a4193ed934638f6e5fac288a620713f4d8ce95. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA011561649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daa82d524826178b0a13173a06595a1746f34e518fdc959fa5e24d09f2be7b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA011548006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1835f5c3b1d7015c316970772b6389a5504f88586986a187ce03edcc68e91c8. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/ES31G2000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11732657ca668bb36533be98547153d13be878f066e09e677d0e3c41c7d990ff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012010150.