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 0x3bf5d7041be296eef5f146a9f2d954ffae87e279608f9d60e65aae0986653cae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a867d5ef-beb8-4672-ae95-f1d589849576.json and https://artists.proofprofile.net/proofs/artist/a867d5ef-beb8-4672-ae95-f1d589849576.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 0xa5e18d8de669fcd25d898677e00b9506b8ea00b928977372e03ef19209c5213f. 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/USJ3V0892838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060d9fc00acd231c1ab7d665110e7ea245b933c136c47022757a91588645d71a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USJ3V0892839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a89aea57010b7efa63e7daa5948755e1dff3f6fa03d51b79d8844cbbea48c. 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/USJ3V0892843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa111763fd4adac909fbb977d6a9ef0e7fc589d8424c93af98ce36f7cfdbc94. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/USJ3V0892844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de9212649060bb773d3c97a8cae2bf38e1e52b36eeb6c55e8fc09ac58e8ea40. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V0892845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5d3cebee57e95493367c6f53d6a08eb8ed1ac0898d130373fe9e1a5c1971b3. 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/USJ3V0940622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233a7a1a8c007f330176e8edc2085fea5d6b97382c83c1781b01612032f7f67d. 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/USJ3V0940623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be33b05c567be0af10b40faeffc28e7662dac95bb259575130cf92f988de6e8. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/USJ3V0892849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db293202ab6418ae4cbdbbef234cd3e416c480ef7fe008d5b25012784ed35c8. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/USJ3V0892850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241516b418fa2b24a9d89b78e8f290a4b285b541872603accbd5d9582eef77cc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USJ3V0892855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76886a63484f1652d22d5ff0cb69edf36bd2d7e144dbef73af7c2c222d0ec246. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:38Z), 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/USJ3V0892859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11735f28c2b52523f456240deeb084f1f5b3e1177765454ccc3d1681f3696cab. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:35Z), 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/TR1772100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1294d6b53c625629036960cb5b103f4d0929346abd238c587dab5d208bf12280. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:15Z), 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/CA5KR1936008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152724e7c22b23000f0a5c94aef37e6322f5d156adcff681010281b4e2036a7f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR1936012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f93efbe29d3990405253b2bfdc1b8b8f26166906fd85f60299cc833b6f1d7e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:48Z), 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/CA5KR1936014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbed4fd6d059263cc9bfb187525ca6e246362fe02e7a025ab00514b29cca1b7. 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/CA5KR1936016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef8dc0a22fd61611ae9afd8fb5773cb61bde0e413982fde7f1103329a7fbf17. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:23Z), 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/CA5KR1936027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f973fdaec80be6f5d65212bbacf945291807e9ca192cc0c0e33fae3ded7bd64. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CA5KR1936047.
Russian Light Songs, Vol. 3: Recordings 1930 - 1960
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd81723307eea8f9ac582d1783b387d6890b4d98fc4d3c5b73f38eb8d5101d18. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GRHR11078617.