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 0xa97cffa75dadbb1825d2582f2828c141a441a11e6060821f0b186e1506468563. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a5bf24b-5b4f-4e55-8add-5b67f1fa69fa.json and https://artists.proofprofile.net/proofs/artist/0a5bf24b-5b4f-4e55-8add-5b67f1fa69fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Det Minder Lidt Om Eventyr - Poul Krebs' Bedste Sange
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 0x7739ea12ec0d79b8fe4bc98044e2e4aa9a91278ef40d6e29636b20322c06842f. 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/DKAXA0087103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e9519d7cf016c19d5a18ba22a68cbc980c11f56ec12edf041a31fa0d4feb70. 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/DKAXA0087104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7739ea12ec0d79b8fe4bc98044e2e4aa9a91278ef40d6e29636b20322c06842f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKAXA0087103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8651c265cf48f8a5df2499e3bfba8601896720d47ec0c8ce0f8a73d200cd41. 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/DKAXA0087105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7739ea12ec0d79b8fe4bc98044e2e4aa9a91278ef40d6e29636b20322c06842f. 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/DKAXA0087103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7d2d103e5784f51fb2bc5cb3d5be4860ab17a5470aa42080956c72d4593e73. 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/DKAXA9100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d655505b43352cdb84fe81380d037040a0a70dfb4d0e98506030a7e1da0fa6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DKAXA9200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68bfec01e89aa2b91c1f5c3b579598e0ba4fac3cc58621019904b1b123d512. 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/DKAXA9200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e9519d7cf016c19d5a18ba22a68cbc980c11f56ec12edf041a31fa0d4feb70. 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/DKAXA0087104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f3fe51b8f2dc29b3e8df00c7519db7918290891e4a1d3d5679890126befcfc. 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/DKAXA0087117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3f57ac5cd6b028696f4e7e69c325b670728d6ea6f734131b3f147e9ef3a73f. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DKAXA9200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e249709a6ecf227eb74360b07b4d563b92dc156f427c0f63c19590a5799033. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DKAXA0087116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f3fe51b8f2dc29b3e8df00c7519db7918290891e4a1d3d5679890126befcfc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DKAXA0087117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d3175c78b4d5d80ea092ad89a03a6b040a658a55ba0f6729eddce87092d8aa. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/DKAXA0087121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d655505b43352cdb84fe81380d037040a0a70dfb4d0e98506030a7e1da0fa6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKAXA9200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbc230ee637e9ce6fbf60b8fd43b0f5d773ac4cd4f78e669b4ddcfa0750a4c1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DKAXA9100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2abb7156dc79a78ff7632978e3d873913b860e4587b3b6f8a932148183a138a. 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/DKAXA9100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a65599864a484cdf39cbf28bb9aa2f6bdb8a5097c3dc2d2ec4d23a5efaa4ce. 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/DKAXA9100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441e3faac598a7ae908cce8ac7eef615791f05856d8450a8395d2d045d3cb7de. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DKAXA9100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8651c265cf48f8a5df2499e3bfba8601896720d47ec0c8ce0f8a73d200cd41. 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/DKAXA0087105.