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 0xeda89d5260a8465d1a3cc50571dfb4d9feec4017cdfd3f44f28c92f08fd6abf7. 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/8d2c9dd2-c68d-46b4-9f62-a6fe6fa87346.json and https://artists.proofprofile.net/proofs/artist/8d2c9dd2-c68d-46b4-9f62-a6fe6fa87346.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 0x197501c146d5b0933a06048357b6e377c4b2ab1546f3e33db6be7d0fb55868a9. 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/CH8381600264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff07943b48caa6efd0ebc6bdba18cfa3cb35f0ba77b297e6201e9aec7673d4a. 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/CH8381601106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd9b9950d84bf34c0a2706285fcd6409d778a1197869f44299704bfe810d8e. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/CH8381601111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08dcb58c8ead4d2cf907a881cb0b845df27fbba86ff56aa61376afe48cf0e0b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CH8381601120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cce745ddbfd0b4e76bb609f3d1489f8900e78a59c6dae196bad424591d1f51. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CH8381601122.
Alls was bruuchsch uf dr Wält, das isch Liebi (Die schönschte Lieder vom Ernst Jakober)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabcf52b4d18a73dc713f0ff427ca9103eb4cd2a32841d1b76e1ea0716667546. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CH8381601006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120183ab49876db2cd0f29536f77a4bc443cc91634d29ce7fac958ab4796bc2d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH8381601014.
Churz und bündig - Schottisch mit Chlevele und Jodel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b13a21e8af15e95175e7fd75224858636a2bb07309f33413ebe0e3ebae5271. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/CH8381600424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbf55cccd5f1113669328662c9b3366e118abb8685c7fccd6e69140c5c35302. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:23Z), 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/CH8381600428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0e14501bdd552a92901ee87d98fe9252641e70dcb7e1f5345e397e9aa07c50. 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/CH8381600429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16688b8030a4f1000c8eff996c70d313a7262c1618478cd31848a43842ae93d. 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/CH8381600432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec045ff6e4df7f0d8281fd72710547cd39de4e917abe869eb582e74bd6d705. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:56Z), 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/CH8381600434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb394fb30aada9ae0efd00a84e008d31b68dadc3303559a2f31e064b0f5cbebc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CH8381600435.
Für d'Schwiizermeischter - Schottisch mit Jodel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf169b2017ff2d7bc441dc22872f632eef5e8b002407a31769507c281a4b210f3. 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/CH8381600436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d2a159ab712ed217d50545e05829a73615c871a86ff4964175150fb8d0e79f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CH8381600440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8f2f85066e34cb583a39ba786503bb799e4413cda2578da93798fff03d4352. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CH8381600441.
Dr Rudolf Stüssi-Priis - Lä-Wa mit Jodel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4229d750d280eba288aeb600cf4a4adc96451311dcc431c6a6135ba08d5602. 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/CH8381600442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2e994895cdbda750289163e06def47329790e94c2cf4ec5e01a3c001112589. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:51:26Z), 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/CH8381601033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea74e555d55d872495e67a5ec6567959c7110e85222489c60f204ec3eff48a7a. 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/CH8381601034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd6ef9336a1ea0558b44fb966bcbb7a35bd5d24998638a65f80ecf1765fd934. 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/CH8541000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cf2ca0134e61bfc32a5d4cf56f4f195ee9c042e0fcf1bf3cefba58f53f4a32. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/CH0209100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471aca2c7c3afb7ea3b23fbab29355c543f3e79848ec5d8b2c32632d7d1931f6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CH0200809644.