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 0xca0427a1b7d1731fad37fb88dd5fa0af6178b77a307819cab8f05a3b98b99bd9. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9296633f-2eea-460c-ad45-2f14eb807097.json and https://artists.proofprofile.net/proofs/artist/9296633f-2eea-460c-ad45-2f14eb807097.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 0x0d9fd5bc2094db877e21e63b5bdf31ff7b3d9a28a20c8a7b552004c4480eaf3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE4X22300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57bcab26a6d41c8bc5a2ef86039753e4493a65c3f5407d7787c6cb566b38b30. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE4X22300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031f7ec33dec8b4c54589160c0b8b6e8eab95ba5544318e6691a83100e324510. 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/SE4X22300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11b98c38caffbf3413c377bd4b8cfcffa326db81e5a4d3ae4fac0eadddf0c56. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/SE4X22300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995cb2428b6a0c35c37dec9aca5ed2b69739fc38c31ff3c3fff29a91508f5a2f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE4X22300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd938dce4d742fef49afca5162b1f2daac69138e0b2b47fd262a70229b2020c4f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SE4X22300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc21111a8ba94020f13666f9ea08f40688aaceb98fb7bbe17c6d0f3e4ae32d8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE4X22300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f430f802e33be3a10733e71850cffeefed45e81513a54f8501a11aab77389e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE4X22300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2380e3d5cc78a34468576a271796b623aa99acf0f5f85018cae659bb8cabcb70. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SE4X22300509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16905a3cc8e9c902f21e6f31eced2a5634ff39efd5f9d8b0424f576348d0d71e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE4X22300511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf24fda65836bb9d1d570be40e76ee0179a404bce116a5aaf3dcac0c3ed4801a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SE4X22300302.
Du är min älskade nu / Modern och dottern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031f7ec33dec8b4c54589160c0b8b6e8eab95ba5544318e6691a83100e324510. 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/SE4X22300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11b98c38caffbf3413c377bd4b8cfcffa326db81e5a4d3ae4fac0eadddf0c56. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SE4X22300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57bcab26a6d41c8bc5a2ef86039753e4493a65c3f5407d7787c6cb566b38b30. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE4X22300201.