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 0x98342fe5ff3f7f5e8a27a2cafe27fb82640ecd0c2f8099aacb054f1e8b61572f. 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/62d49343-2921-45ff-be76-bac65b3cbaa2.json and https://artists.proofprofile.net/proofs/artist/62d49343-2921-45ff-be76-bac65b3cbaa2.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 0xf049b91356eb3be3fb78b11e05826cf3bf9fb42c5c8345f8645adf2afcfe2074. 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/QM24S2302323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977c2357fa439815f0008b761b57e58d4f4f625f409df73b6a7a1db613862f4. 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/USUYG1340653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930db2be20a22e8940adf7ae3a84dd88613aceacd37a09d7b67658c4fea03b70. 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/USUM71301264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f1510d490e4c12666e3928ce1865f218e6d9fec1c27b13318bbb36245bb545. 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/USUM70972129.
There Is No Competition 2: The Grieving Music Mixtape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b89173352de37c33b23c7a2426b1e7999dacc87535c8d3e5c0585ae7fbb00. 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/USUM71018504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d55edcabf17be91bd0770484d10d346cc2b02f831ac235e286d5505506cf37. 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/USUYG1340549.
From Nothin' To Somethin' (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c69782bbe5581de87986fb74cc426e1d1bd17a3a740fcf3483bc0d213ec6a52. 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/USUM70738033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac91b1fd54c81778497aa8d9ca80e2649da256595ce2f8ce4d2e90087aff6a1. 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/USUM70738039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930db2be20a22e8940adf7ae3a84dd88613aceacd37a09d7b67658c4fea03b70. 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/USUM71301264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec723d79a4335a121278a026f777579113d01d53f6fb8076593b4824c3cf31b. 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/TCAEA1852505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34efd0522c80497188580a946c409b9e0a6ece1bea7a20a363dca2565a9aa9d4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA72227548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272154e9689990c2858f7552456a93b0917fddf3e804b7b8da12cd9a2ff6308. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM7281846779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ec2c2258cf9a6a3d9b2aca3d7547c53f73a630e40f7b9021d8c78a2d58937. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QM7281846780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4badb07fddcd4360319986db421e3f8451b28ca1310f9e3d0c80525610f07f81. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USKO11101073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5f872b68b452ce097b74beadfebfa1c1670ecab9348ddd229513874356d607. 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/FR6V81365362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c31b38c3accbc5147852ef4610b5e17c3cdfbadc7e2856bd04da64389655a4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR6V81365379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc413602ca4572419b2ab576c9d77406c882306d900b0bac72115a93ae10c29d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR6V81642142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a8d8661bf8b2a45812bd5037cc16cf59adbcbce4cc8e775dbc2a83fe6c694f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR6V81468230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81837755f60237cbdbb313f9f3922e51f5b0fda602ab4eee3a83054c990f1f06. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QM24S2303500.