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 0x1b194679d4ac24f33889dcf5faeb285db531bfe108c85f302617347dbf515bc0. 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/3191b62b-1ea3-4341-bdb2-94d4c3810c05.json and https://artists.proofprofile.net/proofs/artist/3191b62b-1ea3-4341-bdb2-94d4c3810c05.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 0x9c97a343c0823f4f3b8b2f18cde12e37dd7bdb333c7e31722e1d395a59a69cc7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UABG11800050.
Пісні для малят. Веселий дитячий майданчик
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142c160b5a65ff12bda43eceb159c52c2f64c0cbd60875bf331f11f83f4857ea. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UABG12000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce849e40961f07261183d96cbebc8db521caebd5976fbfd1da6ba117471b87. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UABG12000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73426984cba0300d4593e5d31a77468011adb145baf7ff29c534aee7a31e4a8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/UABG12000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fa6fc665da16914a4506e0d829df9349c7e17921dc93a270deec4f0088c5ff. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/UABG12000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297d17eaf8375bd5ebf2fcaf464cf978cf21e24b6d489742a515b14010325f14. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/UABG12000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4991c56516d5e7e884a29847cafd9e38745c634db874c2236a34c1a4f2637e1c. 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/UABG12000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a78db3e2f57279e2c46e44cbf128998e7c7f6907d74d839842aaf7127f4154. 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/UABG12000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d76a6f368ae66c9e8a82047d4817d3b8215d6c07527d7af86382afacd03f4. 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/UABG12000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229cd5962913a212d4d80edcc7a36c295ea3cfd558527df9b2e328316ccedd70. 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/UABG12000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b4fe44e864e3e43734364ebbcb76673268ec07774a5dcdcd6a75b32cc4a322. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UABG12000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe407f0a30d7a411fa1853462d9af5713752d82e9aeedc5d4d1d082c7a7b2c3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/UABG12000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5734f147d04964d12a1c66d7c483a7c003e83520a7b9ffd5499f787550c1e01f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UABG12100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4ac8436ccfbb88fe360e61b69b930754fc0cd178bfd4d3e97db3d40371e20c. 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/UABG12100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1884f00b90737c535eb0c56d3de05641e357fc4906d2200b6c7345fd3423390. 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/UABG12100008.