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 0x9378bf822a0500af3565f644b84ccd4e60fbe00fbe709ea69c2b9310628837d6. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81398e2d-8790-4d5f-851b-9ebe87efcc6a.json and https://artists.proofprofile.net/proofs/artist/81398e2d-8790-4d5f-851b-9ebe87efcc6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Änglanatt - Julmusik i tradition och förnyelse - Christmas music
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 0x7d03cc48ffdabfb2976fe3307cdc05c034b8c97bdc6cd880155436d04dc91fbf. 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/SEVOZ1150601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9e6ca4e75889374e4ad74cbdac3ffaf8387a8a57f9a97761cecf3d2cb94aea. 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/SEVOZ1150602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf919b5c55c9adab8d1bbe57180cefde983f1198b58b299e276a562bc7025d1a8. 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/SEVOZ1150603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5e683dc177ac4edb03e47c301fa983fbbc7b0d0d302992f6a1f321c3b54438. 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/SEVOZ1150611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9f13c50cfcb161fc5d0282a89b72d5e01827862882e9c0bed883c89ea9828c. 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/SEVOZ1153404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477b4d6a19d0063f4963b227d61b83da27ea872b2153a7b79de5f84a10ed9727. 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/SEVOZ1153405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d1f1b09714585a11f0507b3d9b847e9f2f630c4d2222afff89bf836b9178a4. 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/SEVOZ1153408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e473de6b9890456d922aa86563752bf877b2ce7d49d4b8ff997a38c384ee65. 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/SEVOZ1153410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe736a47b64c91ad0ab47ae6e8490824f53ac952a86d3a2563aef34696acbe55. 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/SEVOZ1153411.
Es ist ein Ros entsprungen: Det är en ros utsprungen II.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48da95282cb92aced863249eb63a808535c9040dd9635922557e49e3a6b49fb. 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/SEVOZ1153412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac46c5c12c349e67e561c03fd09be0ca32774cbbdf8e59ea896b098c9a45520c. 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/SEVOZ1153414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416c63d5d48128f78866f215cc5ee92802a190e5298828652edc5c096bbaeef1. 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/SEVOZ1153415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a63cf34b88f8cdc3182584cd9d466f5415e33de4c5be405f2f70e4fdc469e0. 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/SEVOZ1153416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284182a22e14edd4938dcf7829544e9c9150977530f16a7bcb879c42a2bab56f. 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/SEVOZ1153417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb8f663175a3c92b9ab78f349f29a511f76af522d61d08dd776b07a6beafc5. 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/SEVOZ1153418.
Stille natt (Stille Nacht Silent Night)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf120dcea3dbde01b33f45dbf39192457ee86502a3d347ad13584885ffc151c97. 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/SEVOZ1153420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df5f3aa7787de098f708231afc0eb8a6b27758c5184d6199458007e391cf252. 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/SEVOZ1153421.