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 0x46cb677b37618f6745a114376ea2cba5f06f847c49ba0761971f01722b4b047a. 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/3c7e65be-f2fd-48d3-8834-b57108c9080f.json and https://artists.proofprofile.net/proofs/artist/3c7e65be-f2fd-48d3-8834-b57108c9080f.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 0x3a95658a8679a4e2f9beb5824d3edd984c8cdd30560a5fa0270d553959a18967. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DED861130101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41a315e7c776d6afee6f298d24063bf4b2f61706350aff7173603ab791d1de4. 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/DED861130104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91fb2e4f26a617a93e86ab5a942ba910299397c192e47eb36aa5627533963c8. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DED861130107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aefd28cc430ad92192d227a40ca4a811012c004e8dde940061c9153363bdd1b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DED861230203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb592d1252474154ecaf64b7d286786200c2dad7e939ae1cb0ddf4d480842986. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:23:26Z), 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/DED861230206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4d5beff5cab8d0963f61da71fc4be72e989efdafe3406b2f58f5b8da61f30f. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/DED861330208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c6cc80a1303c6f555aab5f23201c63b86af04fc48f5324f200ec27c5b1035a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DED861330210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaab416613383ad0ce3c0af86ae42de0acc4dd8302c5827fccc829911827068. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/DED861430203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7016c885b06d1971258ed5d1f7ac4cf73f37214895e1c7e65e8cd660d6ecd8f3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DED861430207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf41ee699101e18df3822a22ad9e3fd7df0afeac0e5b23f04bc1b6516fc6edc. 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/DED861430210.
Asato Ma Sat Gamaya - Live in Tangermünde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955bda9cb4b7a6f81e357eb1e52a119cdd78cc70a27380cb9fd2cdc8f72c49b. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/DED861530902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84c5b98af3e95370f1172a49ba8c7c0919e1e385b74fb3f99f7f994dc64ab68. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DED861530903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ccbdc43d1630469deeb0f31829b9d607c5e49d29d62ae471c5732ceb2f1ed3. 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/DED861530904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c449df91f410bd3d21be7d2253646010dad63d6f1157409e17f3975ac18997b. 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/DED861530905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6820d0bb0f3bacf56fa65eafa901db963cb8ad04460a6d33a13255d5d8319c9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DED861530909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166eaf04633179f88b754c91057657cc90c346f81a9ab0b45552ce77f65a8d29. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DED861731001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb5c9d723a5ae7c2d5bc7fe5397729f00771c3d8d4ae7108e73e92d736050be. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DED861731002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97961201191ff1c26b84831890f63ffb10856366d631e87e1d35f747b42b14c0. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:48Z), 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/DED861731003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825b3234138b11c995ba08e763c45d678ca51871e1d52de8f5c6793397049bc2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DED861731004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaefcc391d8a2b3ae54a81cd2586bc5c2daf6b345594bf26c6ea89b2731e734. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:04:47Z), 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/DED861731007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d03bd1cf1e28399b6bb713c745cb59f1c04e778e2b3f92c71953f4d8235b5b1. 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/DED861430209.