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 0x24026c3394bd4049c89699fa15aa6d727057d906f7c36aefe08b77bbf0ab7df2. 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/9896dfb3-b954-43ee-9738-f4a028532d32.json and https://artists.proofprofile.net/proofs/artist/9896dfb3-b954-43ee-9738-f4a028532d32.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 0xbc88235e1f3b9a857cdb2c131c2a9ebad1fd7c0ec92d1c8a5c8bdca70ea29e35. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US39V0400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c5c5bb3908a884de045e1225caf95010390d8ae8a9d124bbd0f550a7a9a8b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF1319184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33722d6471196f0b1c7c786a4d055b8553dba7eaf708cbe2c0cfb09addf45711. 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/MXUM70805378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92869adedcd7ed2460ce02b607cf652996a9e1e88517fe33d4d3b203aa4f6478. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/MXUM70805374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c10e67adbde5880de667b70fbb56df099ede7b5e545b9a371b12548a5898b7f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/MXUM70805379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9452799900d8df76acf1cbddf31e2b0e287711d572bb3e22e6fe13c3c9417ec5. 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/US39V0400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3620907427aefd9e530dc426f123525f4993f51b05ca31f96e2c0a960b99cfd8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF1319231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bf0194c7253532bd6fc02282bff6bd726df38beb836fe3bdbae93d5e6bdc43. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US39V0500765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b183138c44a18a7b5dd8e1e2ed28b7f6a7c18149e3ee337f7ab617f22cbd86. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF1319143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155680f18108dbc6e37ce0e911fe8b818153105a8c543636945abd20babe670. 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/US3DF1318299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f128c2d79d6db6994139e7e455949b0bcbfc8a81d70a4190eadacf15daa9e42. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF1319296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18a8fed008b88ad664e3728d10b448d364b05b653b34fab1ae5c9b259b97888. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/US3DF1319293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3551d9a2748ce3e28f088d03f5760c72e60d75a3ca8dc2970cca59046587cca. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:32:26Z), 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/US3DF1319244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0f6c5970b0dc33f6f9c863d6d15dd7b51e533c37257a3d28d8555c522f7229. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US39V0500785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb74b2a0932be79fea5d7e556b9abde0ada0b7b7875f3a04580eaf6900f6b25a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/US3DF1319291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8458823c8babf9758e7370f185201684dc75dd2fbec45189823fdc0a362f10f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:35:48Z), 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/US3DF1319228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd22a2144254c5c35f316430cac16b639577d971cd5036d1d98833e5f00ba5c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:59:53Z), 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/BK4DA2320669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b183138c44a18a7b5dd8e1e2ed28b7f6a7c18149e3ee337f7ab617f22cbd86. 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/US3DF1319143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077bbd607a31cf8358b1e09b8b1838a5dfbbe58676ea4b6e1df03ec912b9f2bc. 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/US3DF1319290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7fbbdb91b74487d1a1631ac91f45448f8a824bed576149500aea6fa03f8890. 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/US3DF1319297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3551d9a2748ce3e28f088d03f5760c72e60d75a3ca8dc2970cca59046587cca. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:50Z), 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/US3DF1319244.