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 0x6b632890420a10a17c7a7d224baaefb58afa7c26bee512e4d9ed6557207c0073. 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/d5391b89-833e-4c50-bb60-c72a08df3a23.json and https://artists.proofprofile.net/proofs/artist/d5391b89-833e-4c50-bb60-c72a08df3a23.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 0x6a27708340a96b939f73c786007722cd5579de3b4247b026102f0bb9803cb0d5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:02:43Z), 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/TCAGQ2214987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3e9974e62cf1ccd5469e66dbcce6ce771be48b3e6c237b12430476995b3be. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAGQ2214990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273283e870b005624a2efd8cc0673f4ff9da8380d8dd8f9d2e1af575c1531d83. 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/TCAGQ2215026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2399912832b31147e926dab9b91e72a7cbc3c7553a3369addb79282074660c. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/TCAGN2248597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a4930705fc7048dde3de9cf953e0344d1f1e9e71dd8e8519b682832da77e12. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB822300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d6186747f81991c45579781f692946c44398fb46ada4bf301d58d038b79b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLL582100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11302558ebd23d5b5f50e2f80a2d2b8ffb6f2328e782a7b6925c22b1ad5742f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLL582100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd565fd7c10f1a3fd0e70587a111ce4196b290142cf93536eeff98861344134f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLL582100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6384131036694932b019ff91dced932c37eae2e9cdc7a916ec47f2a9a0610f7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLL582100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b23cd2f34c974f38943f451fc77621abb7c88e6c420f59d2d4a577ed12cba69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLL582100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8bd018e6a6c908e15a5d3e0090a190776f2efcec0ccbde02f3e99b576fe575. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLL582100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6582e63e3b54be167b95a8b45508afea87c305e483f7fe38367047aba99ebfc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLL582100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172222f496e146807d776258a372ce2f82a0e542d3353119072daaa19c7212b7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLL582100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa82f52387c2a228fd0b1a129a53aaa592e8e06d1c8e2b8ef755797b83c9d95. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLL582100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1735f80778b85b4c770598c803d003ac20bcdf325ea7c1d719d37a8b2e879b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLL582100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beede799d256ff3c0a02c1284a41196de6bfca6b069e9d7edf1417d74172546. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLL582100014.
Zachodzi Słoneczko - live at Cavatina Hall
Pieśni Współczesne (live at Cavatina Hall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0495b05e970d93933c43d983dbed78f36bb8bb64198bc93dff64e40e034a534a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLL582200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dcf04b92d7b3b056d292af6ac32b79bcd971a5d3f013442ce4c24dd7d51341. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLL582200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb557c902976317838350bc72e55439f98a069284cc9ad555652f5f1292e8ee. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:53Z), 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/PLL582200003.
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 0x3d1e0491e77da9ae9ea300c13b69f9badf2643b889fef1e9f83e605d1c8b9a45. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLA246610909.