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 0x4c70a917dcf5685bc2afda036808c1b9226d6f9c881aaea5f678541245b00ae1. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e82c1cb-5771-4221-b0af-4f4ec6b2fd3a.json and https://artists.proofprofile.net/proofs/artist/2e82c1cb-5771-4221-b0af-4f4ec6b2fd3a.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 0x5c3d66497d744ad1a0fd369b01578143807a3d9125e667c82d59f14411697ee9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:32Z), 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/GX53U2439896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f414206a511b805de0c2761d4282675ddf85e8c583f2e26270fcc7c0afc64f1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX53U2439866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61be0825d807be420b42cb3ad66bfeb4ec4efaad8e1ab052913fb05450e2b1b1. 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/GX53U2439901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d9a2c8b29499ab6e99e275dc7e8d3b898c22ac8abbb68d3c95d5e40135dbb5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:27Z), 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/GX53U2457240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cf508112ee4abaf5637bbf98a90e2b728198bd875cc6efc730555bfcbf81a2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2457236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52c01d2fd90322eef6ef3cf4070909f81ec10d09f4c1741b981642bd3108897. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:48Z), 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/GX53U2457129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfbedca478f08393eceed2233cbcc6d74990099b6f157ccad040ab784a4ecfc. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/GX53U2457130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb813468aeed2b5c4acbb69e3cf4780f7b1df57b4011aa1abcc0afee3394aa22b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GX53U2457131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305ce633d8196f021d7ea8c6157909cea4f5b49b57aab7483b3f5d09ec621305. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:09Z), 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/GX53U2457132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645a81ab5138b9fb8f80a1629c6d7a64bd25c0efff90aa4ba35702b442218327. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX53U2457133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e8edfc6b6f43e5cfd19d5bfab957e57297998a3f03df17218aeffe6a6354d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:27Z), 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/GX53U2457134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a45b6e496b458b6e5e6620a392ab1d55ebaebf428c5ea1522c72f4eb9354181. 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/GX53U2457207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd68f6c37d18d51aad973296f614d6765a03bff5a28663ff6a45350050715b9. 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/GX53U2457258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa451728531089a27579f65edbdc496c5f64389e619aec1b9d06c222c449dd8c2. 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/GX53U2457259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4ac42dbd7cf7842f0d341caf8f24ad7f5361710d8b6626bd7ae83468fbd1f8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:13:21Z), 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/GX53U2457260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24adf93d532cc5f6e48ad838f137cceb7a6f18f9b4b96f3f1dde0c5f5d953d8. 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/GX53U2457261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa247a7b0a87b6369c519dbbf25745a86d4c17add3afaaeb6aba8b0718c95f302. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX53U2457262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae171d4b20aad6a67a38eda569a27b0d7478037d802d9e835ab0787ecfe23e7. 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/GX53U2457263.