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 0x49da08a84c6d3e2e1517f7e3b095543796a9341025b170532ca0b1d27c1bb88a. 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/dff84616-bc7e-4d8b-8d87-b3cc23b130ad.json and https://artists.proofprofile.net/proofs/artist/dff84616-bc7e-4d8b-8d87-b3cc23b130ad.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 0x556ed01b3e7691f1cd896aaef81a3fe10e575b98df7ce59089baae87f836c948. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIVH10900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2cc5624ae9242f97234d87aef7c2115ad7182e9c748d8939d58bd035e5faa. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FIVH10900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ff892e9535c034c13567eb5f100c7d9eb9bfc42fe30c1c5fce088c32e2e3de. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIVH10900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392fc7ff22b83534a60f822779f3ee86fb44551de87738496b361ee7927b3b5f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIVH10900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06d55e32f0ec8ce4942be812621e7c14737a0f650d6d71dcb9bd25d9c96c176. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FIABU1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80e92fc887aa0b6ee0f054b2050c7a5b58cb02503473a70020363855f02774c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIABU1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fd82f95a4f58e0c8f48a62052270f22f1f3d81b40b8dbc911ef59841df06dd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIABU1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0590e9b64d8745a5ea0168031ec79d6960cb11565da62d1f2f74d8a1049f352. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FIABU1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907caf095e6d48694d3c764a9f4de49e6c5786de85297e1fb4a4947c30b49ba5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIABU1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b4cd46ed1ed0b648a08bf26ffb4e0edb2a683dcc9b913b21659d3208bb8ee7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FIABU1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac1ea3110aaf393373d331809ca8a95ea894ed726a4da628a0e95817e5be2d9. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/FIABU1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db2f83b365f3a6a7e2d71727be6bcd4815f0675eafe68349a5355ce6feefda2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FIABU1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13182eecf9740fd25978ac07e4ef7659fbfd6aa6a2b00eba5b40ffd2d78141c4. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FIABU1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591475b780404762655136af1269f34394f8a7a2f0b7492a30e1cc53dc211167. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FIABU1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cd19b7a9e2ea0e35fa4e9a71219af730d9aa5c745eaf5f4061e9c84b28948c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FIABU1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117df7645b7fc56fa6a7a54a84d4c097f1f185ba7c33a260a002b72495b7019d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIABU1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806416f5e2088d95d272ee902c3b06f46817c18c43d673df1bae75d8d74f26d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI2SD1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87995a6550ed4217a5fcb3cadb68f5d10c4967067ce800b509dbaa4f38bd5e3d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIABU1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5d21a0e0e0fbdbf1ebf09aad2602339924b511121c2b12ddef5826b92e0f4. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FIABU1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2883191a0cb25ac1d26820c2ba35a5a5b177d6de092eee7f8111b851a6f45629. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FIABU1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d12b222ca9fd308217e77a05994d3e8e7c7c1b5df37d64d66609d54a6b3b13. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIABU1700008.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0f9e30cdef64e303feb8156a73714c8b41885cdaf1f0741840ded218ac4a3. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/FIABU2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33e2bd7fa7a3db207e45bf2354695dcffe46ee39d9173285456c8be87c9d829. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIABU2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ce94a2f9ee3e5bc0c8713b895db77a59f5e31a87ec7f752c0fb659c7441ab9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FIABU2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab96316d107cf0b58052ad01aae1511eb99495f85762bcc4b30a5ec0a96c49ae. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FIABU2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0c11d04b9920296e68c764c885dd7413b69645302a60486f34ba5f9a86fb8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIABU2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89d31c8c4745ed59a0ee54e5f35f3c722b7b6efe7a76abe38acaef44aa9b0f3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAENV2246415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aafd2706212aea2e2386a8111eb56e2e7c62c6be3c0adcf9b939b47d208833. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIABU2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11b23b453f13b4085b6e6d37c190bc2d75473fd255b3fa38401794b65adddd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FIABU2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a65250783522f3eaa78458a4c864e8c602492feabb1ee640f9d0720cd610273. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FIABU2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13aabd9f1145d9b2d72996eb7946e500c19e6c11a1c99fba16bf6c7951a7e87. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FIABU2200005.