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 0xaf94d21d85f823c807aebc8788b35559f8f4a27abadec98d2abfb16c2e005cc5. 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/09941900-1abb-4d8a-a87c-224960f13aea.json and https://artists.proofprofile.net/proofs/artist/09941900-1abb-4d8a-a87c-224960f13aea.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 0x2709c5230026b4752d8e4ad321b17e5e6d24f171843d1afc1fd8dfb13115a1e7. 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/SEPQB6907020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe86732f92f3970c7d2b57bbe6b4b13c861c24b388d3a5962c9b0d1fae4a38a. 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/SEPQD6908040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c14df5091a9357e4958dee55bc48031d0b8e9a19c9a04d2950057a40613238. 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/SEPQD6908080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf962c7400fb7f44e84e88f4a3cae5a464edaea347acb325b43aaa0490e3d550. 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/SEPQB6907090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efeb47f0a2a48fc5dae72c1920bda3aecde01d3075ed0142b96769f7202e892. 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/SE3QR1601101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3d3c3301ac7c1fd34a759a0b685319899bd3607d9f6bc76b1623db00cc624. 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/SE3QR1601102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccaa77b1b989bd38f98108d1ce9776c72142c8958ff9d702bb69ccd8f5fbd6d. 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/SE3QR1601103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0de8b4e54a91e61a668281fee5bccfcb51cba7196be718212394a209c4fdf8d. 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/SE3QR1601104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bee9a545572d50c04864ecb04dc1a3d7e4e8c6c3f94d1bcbcf7525a372eecf. 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/SE3QR1601105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad9c49c2469c43c9d488a92982f07ee681282cdd5c62026d92002ef4aace811. 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/SE3QR1601106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548c5c49fbd28f3fe6b1101465cce3478c15520460d88b2cfab93571a757d0bb. 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/SE3QR1601107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5445ecd4e7a3f1dee3d993eb32c364615d7d2a63fbc5ea35041a706e6f293d. 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/SE3QR1601108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf28edc6907eea613109509722d0f3f89a4a976b75eff2827133a21ca1048ef8. 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/SE3QR1601109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d90562774fd1b3894c1a76734d57ab1a7996e0cfb10686d835197fe28534aa. 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/SE3QR1601110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2a375b8e646eeac44ba18a368f471787a091a122125770fe620932a4418f4e. 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/SE3QR1601111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd10f85703ae38525a26c27bf651d93f95713fa2f4dfa9424b72757d5108ebf. 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/SE3QR1601112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e23743f532b73c1339a6eab68d06127f2c711a2c62a247a228b720d17727af. 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/SEPQA9712010.
Glada Hudik-teaterns Trollkarlen från Oz - av Salem Al Fakir & Pontus de Wolfe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75997315b4105ed52df0beb7aeee3f46cda9093d07a4981f6d0d23f543231b0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEUM71302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe86732f92f3970c7d2b57bbe6b4b13c861c24b388d3a5962c9b0d1fae4a38a. 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/SEPQD6908040.
Barn på nytt - 25 sånger av Georg Riedel & Astrid Lindgren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4eabd892a25dcd97aad86e4d045d0b604bac329317e4a4e60044e6975e437e. 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/SEBIA0300118.