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 0x7a8be0e7bbf7a691103b8311a55a8df00779d38406ee8ba6edcbdac2b5d00a54. 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/8bf99f79-4dde-4fc4-b31a-0feb32f7e55e.json and https://artists.proofprofile.net/proofs/artist/8bf99f79-4dde-4fc4-b31a-0feb32f7e55e.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 0x44ad43951ed332d24270d54f76a321e1eb1c6fd9c2c9775c019dee22e064c199. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/RSA141302566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbe05e6e565451044c65db87783a065fafcb331eb30d96938638726bffb1c0d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/RSA141302568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19058675f3c543cea86e8d333ed189388aa616ee16fdbfda2e7ad795c9040a2. 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/RSA141302570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1561866775fc116c740f0f5140d178f97b0f4c02a93b62d7801ac957b7b1d3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RSA141302573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13542f91e58251fa07f90edd8bf7e97113279183278467738c9b4440c077dfb4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RSA281500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9a0b5d3371d63ae31489453081c95aa809e10059c39d1bc493100a5947c2f8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/RSA281500522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17bffcd845d9a18ff1986ef3c6accd265c192e6998b9c97393daf0faafa52fe. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/RSA281500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd812fffacfbe6e19d930c06ef6a60565bd91d409ce8c840fe3a1a5cd9b754bfb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BAA0A1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b207ea4458d7fb9867437d8c752d57d15d961c55a9c29c702902a6a77a0daca. 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/BAA0A1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b49558ff4248aa77d916ba98fc77884652a0cb3ae8bc9f1504ee6c49c60ef30. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BAA0A1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7125fd84822d176c491f7558d8d67bd596d9cf156534c847f0654cabdc322112. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/BAA0A1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb03d4aa542d02e01db0e6f4222ee0f79af8a9bfa806ec516b1a130fb692b8. 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/BAA0A1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd781c258da804fe11ad4f0a0ed94f47cfa0bac4bd908d4d720aa079ad660e84a. 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/BAA0A1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8920dbb59f0554febc881c01fc8f5c8b92abd3b6fb68396bc3b413d270ddf7. 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/BAA0A1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6953be51fb3640a681ae1584dcf426c3cf88724248fe7da0ddd543994db384. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/BAA0A1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab06d436f56f05c5fba272e386884a559bf186df2d323ffbdde2a3e6e7c8d4b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/RSA281501072.
Divanhana Live in Mostar: Sevdah Music from Bosnia & Herzegovina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7aad939c1191784a3edccf1db264dff6b9efcc14541c6c007dc3de319f9f81. 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/BAA0A1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15a53531bc47d74d07f31f16f455b8846fe39bf4e969e9a9b702472a72d6a60. 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/BAA0A1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e1fba396d92c532d49222f375f369b0b96d5dae278fb238df3e75afc2201f8. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/RSA281502347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2959e8ea23c0960cee7e4855454db454223caeaa47b9292fc4326912461e33. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RSA281502349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52c5d716a6745c09e0e8179dd57fc0d4b77e7168306182ddf192be3aef18695. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RSA281502351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e3e3a6db20bc237f8535fd7415cfd05c82c346155b1b9e3a5ed505da951e3a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RSA281502354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6510198214cc4de19e188450858a47b04907844f7599cdf785d111beb9ad34. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DECW62100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673f99fb1875249fb19cf5a9369e6401397e37dff3ccee9dded1bef376b3e37a. 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/DECW62100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3eef0400385c7726fdb4ebe63b88b3f34878bf822e3b9575708187c106359b. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/DECW62100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8933479343b14c7816423c98f05ac7ded24fb5a36e252686be1e281884f192ee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DECW62100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d6907f147a3b9cbd99a94a7238df245980546175958daa606e2c5ddafe9bbb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DECW62100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0faa2291c8ce9cb530e8c96b61dbb03bc4a6e4b0656a6be096ca5815a17c0b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DECW62100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316308c58c5775130f6824c185950723c239af9976447355651fd8efcb8e90fc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RSA281503302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316308c58c5775130f6824c185950723c239af9976447355651fd8efcb8e90fc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/RSA281503302.