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 0x17e3bffb65048a25fab455cf2772121613ba91c1936c51ea3d366f84c41c02b8. 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/2d1fa8b6-49ed-49b0-b9b7-19a7dbfacedd.json and https://artists.proofprofile.net/proofs/artist/2d1fa8b6-49ed-49b0-b9b7-19a7dbfacedd.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 0x9965c53b6014c536581d6b8f154cdc0340b4dd076971aceb0d2982c6c8ef0fec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA052328902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c90cc8087239efb8f3d013d4d7cc5f242aee78280e8e4219da8aaa38b2ced. 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/DGA052328903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c7f821fe7e3638de180b2a1bff03b8f87fb955460f957a430e6c656838d3f9. 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/DGA052328908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad894dd81956f7c475e2aaed180f932919e6c2d95865ff88f32197752dae37c7. 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/DGA052328568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af6ab5adc357aad10c84bdaf8ccefd800b396273e2d4db0f575626a0f2cb0c. 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/DGA052328572.
En Sång I En Dröm – a Tribute to Monica Zetterlund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46987ba8f052ce481f450cb765de85ffb5d13630d7a6a38d6fd6592af01902a0. 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/DKABA0900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c42be8f1940764b0f4c89defc03bb78510953c290036cf17744f2737cf422a2. 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/DKABA0900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606cb883132736f77ee2b5ee8fd0f69c6f58030a815c543dd850b0bd85e21a01. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DK2A42100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ccaf67a95097e2f028417b1542444a84a58b44b725c0a12bc64188ab2e9336. 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/SEBAA1500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254164c8c485e8020bf680c365b326f096a81016c07f4634dddf6715aa9ce19e. 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/SEBAA1500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb852474640f1d17ff0b12154ceb63fc378c8b711255a2060c04b6b4ad3f5c17e. 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/SEBAA1500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2782bc43bfd8749ac300c1e9bdb13894eef528ec094b39d5a807053b31eae2c. 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/SEBAA1500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6cc3874cb95c06ab59564292f228eb5e6c532861ebaa3b640e36b0bc42b714. 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/SEBAA1500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3cfe7e741693377db4f67dbe7540c7d9a62e361cf8756c3cfb3c914c798e95. 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/SEBAA1500206.
Someone to Light up My Fire/This Happy Madness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f3b305e7e17bbc078e2f3dd701c7d5989daabf2cb2881aad53630de3d59b5c. 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/SEBAA1500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec15e9a68a8b133ebd004d894aebf062b0ff10c847303c4279fa75ab180cd7. 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/SEBAA1500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256c1d8f35528a72692dcd66443763d68d70f7040f83cae6c1802dd1b35debdc. 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/SEBAA1500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1afc50c8e0369ad2ec4fbdf380110be6ae9ac538f37a4850d0cc59da56b195. 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/SEBAA1500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21e5052e354dd05ed3ce2d4ff82fd7efcd98f15627ca9b4691dd4564f65f576. 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/SEBAA1500211.