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 0x797fa20fcd312a9f3a8cd767a95691d11d8622aabea96595cf0f654c5fcc6b48. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/177695ce-fcee-404d-b1b9-1f350e5d3cf0.json and https://artists.proofprofile.net/proofs/artist/177695ce-fcee-404d-b1b9-1f350e5d3cf0.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 0x23e0e3fbd4ad77e6023bbe4cd5d795e819d9e73eee2618eee37f70ec9b6d3cf7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:42:39Z), 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/SEVPA1700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2149422d8f2aa5d682ea1d4afd45343e4a6190b88be13d2ab070a702fb1a3d16. 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/SEVPA1700406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb9e3d6518375f698d99a173dd74e1b04136549656b8580ac862f78eb2a10f9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:31:38Z), 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/SEVPA2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d852c39baf0d94c998a81269510c2d4aa67700fa6c53a61c7eb633a9dd92056. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TW1934425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c73a54b34488cdc833af138b125e5a6946418187e37829077943d52ee8d63. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:58:37Z), 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/QMBZ91911896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad74198323e21f4588f7f9deb09137108cd500789cfbec5d31255c57f3d577e. 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/SEVPA2200401.
The Seventh Seal (feat. Ulf Christiansson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ac387bec23943bca42a917b758c9074c69d0559d638d21501965ec0fad7af. 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/SEVPA2200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4f5cf0f361128024e08c52c77f8e37130c93a710446b334021778b5d651a5f. 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/SEVPA2200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cf8d741e0cc3597d9dfe84ca97a6f6079f719668e86b4630b4f75a55ecba03. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE28L2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca156adf08e083f01ee3fc187d1ea52b8bce84a0464794ab7de88cf7e32d76. 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/SE28L2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190ed2325341e1fc813716ff394ee237d93a39dc749a1e3917fbe8831d5254e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE28L2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b178ffd48f409786bd13a67fd503dfc8e91977175e326fb2648898d6039ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE28L2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae774ba98a0308d4236ce13809c748f9d471046d663a1bed567c0727580a46a0. 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/SE28L2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9d0418ca26121818535232e70cc9f9fb596050825a79ca8a7adb79f94965b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE28L2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d5a67e152d100450c260dc72b7c953a7d5a7e0c5ac02d96915f9f84b4e19f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE28L2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a83dc07c9744a11b59338fbdc54afb61a371d136f5a4028496d5ccbd5819ac. 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/SE28L2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc678d7728f76aee06a4a2916cd4bdcfd7730f2af86b2d04a8fe032ce5bd8851c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE28L2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6fdfa5ae6c900e47365914243dc09647bcd108e2532d9bac52d520f68e194. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:54:58Z), 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/SE28L2400107.
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 0xe7dc99d2753bf7a0f583881482444c91e056ccf7709e1f8ad3d02c3fda1a6e76. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE28L2500401.