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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74cb1877d06fd7937f5ca887b4b953aa7d93775fa53d4fd6eaba58ab3a6a3e9. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d7c6345-37a4-4f08-addb-bd5bbe067ac3.json and https://artists.proofprofile.net/proofs/artist/2d7c6345-37a4-4f08-addb-bd5bbe067ac3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10f18ce55d5dfe5926287651316e36ea05bd759ccd508d2194d1b8751692760. 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/SEVWU1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a6e7b6683d42a8f8a969f153fc0c240dc94f6c1d5b0cc6d8870b9288a9ac7. 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/SEVWU1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b23430d230ce96ae4b7b8b81fb94c994a315b6a11386ebb799745b1fdbd7a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVWU1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23924185c112eaf93ef8c4829c8c770d7aae88e2e8ea77f71fe4b342816dd2c8. 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/SEVWU1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2afea96325380dd4118584e99e90e8fc89ba3a9608334049d071b2b7aebe96. 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/SEVWU1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe5ac36c5dff8427e61bae68704fc44488fa339f1eb3086470955049f6b6dca. 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/SEVWU1500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec93ec38da5e0b52572c4f5bc4077fc81add66f3c39298c78bcf4a3d237e8e2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEVWU1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02c5a48229e277f5dfa53e6c1e0cdf215201fbe8ed83924f9dd4b560394adbd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVWU1500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300258f0a6d01c1356632969bb0fa3452735592a8b41c58f9fdb8b47c540f428. 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/SEVWU1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cd31dd6b6c47634c7b909ee644b71e8ab888b2132c92ce8df1fb51e7867db6. 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/QM6P41532982.
Änglanatt - Julmusik i tradition och förnyelse - Christmas music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2a171de750c52d603d29231ac0eff89b210edf264b752d0d616b1b025ceef1. 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/SEVOZ1153403.
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 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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01991c3065f9262ffb819f39a572d8ec55b5c27853d32b878998fe30462058af. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEVOZ1153413.
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