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 0xfdbc19c0fb49b59b17fbec3e0f16f11aaa23d35b0a97437e9c682af6fb447212. 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/62e6364d-6fa2-42ec-b694-bef211a4df22.json and https://artists.proofprofile.net/proofs/artist/62e6364d-6fa2-42ec-b694-bef211a4df22.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 0x45bf54e49e4fb35dbb38cab2ddc6bb290782a16586091a8e6770501c7d84f10f. 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/SEVGT1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e60c51c9b839cd21455b58c2682c2f6515d82453b80a92cd989709047aaa6. 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/SEVGT1800103.
National sånger (Hymner från vågen och Epas Torg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed03337361c97521ae8a43ea8cb40975b3db566598ea54e46c04d864e703b16. 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/SEVQJ0200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dddf4350c8f9c3bfc0b6fb56bf0a671c99094e70de499fd752cc33dc65af005. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWBD1408001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9368a4a4d8adf5e4dddcb73977578a5a32d2833cddb86d91654c2d39a1eb597e. 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/SEWBD1408002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf880c715ba3d08ec8d4ab58f400d33909de93d7a1eb119cd01a2dff99f87e3a5. 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/SEWBD1408003.
Lovers Never Say Goodbye (with Anna Ternheim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb4f0dc621a1a6acba43a0a17fe137052637746529dcd89b101f056171ffbc5. 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/SEWBD1308002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbd33b042b8de578348588bcbc368b78075fb18a315dc0c84be1e8a3d012c63. 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/SEWBD1308004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df83241a6973950dd0da585cdeb526efe273f57cda055e68b7f5617ade39a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWBD1408005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20708c854c34379b1ff1a38b2b98779efe28ad99d0b0542ef7a4c08be4f82f7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SEWBD1408006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3446a93e2b8383c43b903ff84f42beb7e6a4d12d832bcde11dba68b4e61cbc4c. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/SEWBD1408007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9844fb4aa97c0be726480b250ace0814e0d3ef67b7d5967551b961dc72bb5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWBD1308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515a2adf79c8bf05920e657d9a284e6727845730fbdcb682ca2e4c5e591ca2a5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SEWBD1408008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6308f25f8e40cf388e56c0e27503f4b4fc297def31a31f9bb76bae9a6d13c9c5. 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/SEWBD1408009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3229fa71e4e6c2a51b6d95da84ba451723a28ebc22afd188a822fbd65acc3e32. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWBD1408010.