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 0xdf5d81535bcacae86f378783bc172b3c647489b797c84d326090956790483d07. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/279e29b0-8e4c-4a41-b82d-f68e4f645b8d.json and https://artists.proofprofile.net/proofs/artist/279e29b0-8e4c-4a41-b82d-f68e4f645b8d.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 0x42951642465eec369a26720c9ced7e2c77c4318ffeb7e8f0c70617caa9afbad9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHNB2077296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8921496f9062a61563a4ad41c1f98e34d6f2df34c189e229b7547ca25b46fe3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:06:42Z), 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/QZHN82136984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143529956732ae3c7b3656a74142cdf0c37f4bc0e71a9163a16c2df00579c2f3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZMEM2162630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b31df06e810ca302ae81b13813298cc11cf15a329c025349528f370a7a87e9. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZMEM2162633.
Su Misericordia (Corrido Rudy Echeverria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fcf2ec3906068aee197bf3717b55371e467b0e17ccd07faa8b2536841132d4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN92470050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12925bee2c9b1a3e5b987ea1b0cdd6613f544bed28f05c361699f68b3ccfdd3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72551023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fac16a534065035f05f12517df70df5c57d6394fd0ba68d14459f4c793064a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42555775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b69b979aec9ff96f13d878b3ebea29d8d44854fc07708fa48d333a21ba48ca. 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/QZHN42555778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385d296233c928b999aebbcdcd63234a5ea7b1ddc7a90267db8d238c90b1de67. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB42464990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a8e64307133cbd4932633444e5627907f210fb9a5d6c62e76266aab11829d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN42555780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557d45836560ac12e6bd202ef6119cb4a9c0435d5d28b867f9552cc1bb01edaa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42555781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35632601b317567c29cf9e19e3ef3ac62497a3665ee9d2147af1d52db8cb251. 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/QZHN42555783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be49a9f73d2359864c0fd6f4966dcc10812dbba4ad36c03eddfc7f00521a568. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZHN42555784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5cfe29b919ec1473a08efccdfca762ed276e8e9fb53888ef92a64c6201d645. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42555786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f46148d47a0b99a9cc8aea57116621cb40cc15e9e7c9e6863dce28d6f56186a. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZWFE2551528.