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 0xd1caef226dd28f49d468a785443fd38af683257d0e4ea06004812c2e90a7a6e5. 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/a0378b28-e198-45ea-b269-34a30d690272.json and https://artists.proofprofile.net/proofs/artist/a0378b28-e198-45ea-b269-34a30d690272.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 0x2fc7ec3f33ca1902ee20498baf2c999310a8aea78e7cd2349b865e8997d8a6da. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:22:18Z), 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/DEQ121536488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ac86fbbc4958f42384329807bf8c0eb944a9d6dee9cccca5606f282267dc42. 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/DEQ121536489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bd23456ac62960287d0c199297061b1da6c354a11125ff9b4cef5eb73228ec. 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/DEQ121641932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7042d32a6e88bd627fe8927fbb814ce574cc1f1cf0f06aa6f4f4ed619856b67c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEQ121637899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e1f40fc4d80c16b492b76ab50812838d716036e068525156bf78f94e298b11. 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/DEQ121643527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fbb87563c1fce7532d23e757798c46fa39de45ac0f0d686e8263ab30b88e47. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEQ121749065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53942150514069312d8793d8619731686c0fb9a3b7d24e8f4dc66ec9f5fc38b5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:32Z), 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/DEQ121749068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afeb66fa2e6c69e699597c9ef7794f16bdad763a31115c2d0a357407d54dd60. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ121749069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1616e3a685dfedcff0161c8408da12536fdadd99e6ee1f1ba2648eda0155b3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DEQ022106098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4b437963a3ce3792d95b69d72dd0b35dc64af784fe926b721606bd284c9bc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:03Z), 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/TCAHQ2397500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe718aa63a6aff291f2f8bd22891d54b820e17303d3f53f7b731b0316dd0ea83c. 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/TCAIT2447855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a797dde94d92330ce2f514e22f07c240f2c21f189c31824adde4208f8df1c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:41Z), 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/TCAIU2480720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf55cb761e287a9c4cea70fcfb30760d9aa09862698791d2a52b2b8df60167d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:27Z), 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/TCAIX2427251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38846f616858cedfc927fa1bffafc542645e04ab35575ed9a15e5c03002aa024. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:57:51Z), 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/TCAIZ2452599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5906b71c3ba46b0a44a4842ec839c14a2184d278d7ba9db22ee8275a287e08de. 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/TCAJA2479941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb931e5285a3df38c07fb7a6704484e6a15475df9ec91693d3833cb9df94e158. 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/TCAJC2411594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33881fcff88b75586ca64464b81d68a560cf2605c089a4e0b854d0e42cc150e9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:26Z), 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/QT6622542738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2b2cf19a613a56dc7e702e666dbda6db37c7492187f7f43f4d7ade506b5f3b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121533431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00970fd23f37cf726af860116568eead9dad86fe8b1196358231dfdfd8ec1854. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121533437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340a5d23e6a55ab5f19431d4f88f8033810e1ad48c2c98d6ba762b303e522b28. 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/DEQ021801004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2549060b2a133133a3da43fcc8768622c2c07a90a921d215d001bc16077af756. 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/DEZC62460551.