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 0x3fa3c9e173fb3bb570443a1b910c4df045f8f65e634f99bda1dc367df59fea55. 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/2bfca858-1323-4d17-bce1-78f17d785b2a.json and https://artists.proofprofile.net/proofs/artist/2bfca858-1323-4d17-bce1-78f17d785b2a.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 0x19a064c89cabadc311c2b9864039a839743d62791f2befe094f9af19d90d3b2b. 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/DETM41610692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67de4827437c5e63086773b895abc558b56b265c4df6399630c66535b2319191. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DETM41610703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136176e9c033c23a53b81f976edd29c2a5f615447aab0509d619549045ecb862. 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/DETM41610774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf357968e522080c3e00c0f1575f1580987d55ab8a20c2624a8c444ef1e7346f. 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/DETM41610781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688e85a417daf81d79796df788b7a128e6c695df402f3e7b60c5c780ea1d1c65. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:25Z), 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/DETM41610784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c12bee339b48bd93b578b12fff782619d478308b9314b0eeaa4feff1ebe89e5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DETM41610989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7896ae45dee15ecf293d341e98f8394a1635ff182e93e98e32957131e71fe8. 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/DETM41610994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066650ffd57389ba16dd5be6a5d3c2031141efb0f3c94ea8f98866603ab2f18c. 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/DETM41611136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb317c3efa66847e66a10405cd42cdf9063ca235c98f4cb8a12a88ac086d515cc. 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/DETM41611064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fa0281ae9e06e472c3c7d249b3df0b5f111c340a96f9e61cb51f3da6a2b2e9. 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/DETM41611135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066650ffd57389ba16dd5be6a5d3c2031141efb0f3c94ea8f98866603ab2f18c. 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/DETM41611136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd386c823d5803bd07635da0e9ac917db85fd6e32cf1b76d1f1cad7066f13f. 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/DETM41611137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e0b2bb979f88869cbb9e52e2586fd77eec53e64b5887dca00ac7a2b44a71e6. 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/DETM41611142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f4b132fa3d51c0f11205f42b906a8bb8355a30a6e761c51079c794a1b52f51. 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/DETM41611089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d9ba6677cb8fdc66c6ef832dd017677e116ad886c27a66c632ea52651fb9c. 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/DETM41611143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60462977fccd191c60d424a583c18b61dd7c4c8973e4de31cb6553bd74ed66e0. 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/DETM41611145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed4fa812cd34638c1de03201706d73722a0dd284c53e2e6e14d971e67706bd. 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/DETM41611147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c808ba1454b533b15e003832208fa16226f6c484f48a3084ce426217e11c09. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:23:31Z), 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/DETM41611217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3a9a1d8437357342d314f445738ddabd2afb56826ace7c98381f9ed21b3065. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DETM41611234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadfe6d2ded98c1d205fb8146b3e91b3de5bcbf8095890a07b23bab826d8930e. 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/DGA052303232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2983aa369e48e3d10fcd20079052bd9c734c39637b0147274d67c45e2fe9c081. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DGA062315963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8b560c34774a792b007e77198aa2fefbd874a952679a3d9c9eb26206577773. 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/DGA0L2366337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7746b9ceb239e0806a241cb49e323b8f792085955137984ee7f483c8f9153a41. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA0P2334903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba27817d851549d62dafcb96484705427fa4e7c483cd65111a5dd12167c8ed9. 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/DGA062411570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5703d71eebc1660e98ab3d352d6acd3f6b60822d341d9893380816829d8bdd8. 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/DETM41610739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621777c02a7321c1fdd4d57f45b2a78abf4be146606f47c5b5669f0b9854de9b. 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/DEQ022106980.