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 0x77a640b88ad336f6d40675c39d4d9acafb7f59153146c133feba0a3009877af9. 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/a52fc805-5af6-4e37-b5ee-34edb18b196f.json and https://artists.proofprofile.net/proofs/artist/a52fc805-5af6-4e37-b5ee-34edb18b196f.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 0xe267d13a09eca51e6b6f92fd5b4b44796f37cc66eece42f1bf47d101c2f0c7d1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEMN91400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f2ef7b5dcd52ffbf0d30c4ebc272f33ae78942960b1b838fa73414bc038a45. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEMN91600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfd1212fce2e62f9348bb7e05f806bf55d41fc051db2f07f0928cc779b12ae8. 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/DEMN91600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bea0ba37a2f83ea24329ae4ca26d6d6e96cdc68a7bc365026050ef0cbb27adb. 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/DEMN91600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c252e10baf4140e017d4a40ede1f0356ad6e86ba32cd9bbf7b126921c2f145c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEQ121855371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a299ae471a1b2df7060c433b11891daa816d47095ae93bca3927ea49b4c63b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEQ121855372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f4ca182f974609a2a0737d4cdab3e24ea96b14a2b2853206fccce4e61a821. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEQ021808351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da16a9b84b2ba6cbafcf3d29516fe47ecf605b2f3e26226dca109ef397b4898. 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/DEQ021906133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1b31607c076614db088e5c83d7269f1ef1ec98bb0644b2c1fe7dd1c7f66425. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEZC62165602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1516c7daf344236b037579ebaa64b0496005ac940f2adbfc992ee26c2e80c1fd. 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/DEZC62165607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db867babf3bd2066ede2c58c6899b694bf14cfb927c5592998903c393712c1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DELJ82063168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b07e7a5ff1dc093e6f46b1dda1c75ba60777578d95571a69dbe5ea9c9f1038. 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/DEZC62165609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35c062ff0978cc2ddb3a3710355b2387476c88e9ce6e398ad288729f0770954. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEZC62165611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e782ef0bc444788d399c9a0851bd6c9507d7e8a216cc0db4722b9c92dd7756. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62165612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd964dbe7775fea085ac8912b813f3fc1639e058a91bfa5c5ded09795be5169df. 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/DEZC62174234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff55d9118cd311210778eeaf7ab676b82c41fefdd0d31618f0f6f7cd8366905f. 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/DEZC62404717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca5d3cdee46e7b8a2163c42d9ac4e880d540c7804befc500e1a2d5238ade2b4. 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/DEZC62404718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa28da5c49e6b4e68a552f6067e8e693a436c95292fc575895d02488a16a9b4. 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/DEZC62404719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddf59f11d4dc5b02e5cc7e1429b0fa032d5f3b73b5c3c549cba686fa83a6a8f. 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/DEZC62404721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8973d7dc500c62e94848beb9c7e99efc4920fe23d5865e090163005a1cda35b9. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DEZC62404723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47523444ab10b97518bf6b40fe0fe30f210c5c4ec3459f53734590c58fd3cc6a. 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/DEZC62404726.
Alexa Alexa Antifascista (The Belgian Stallion Remix)