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 0x5334fda141cb44b410520462c2c51f23c586d7d961aecc3aecb7b1e3364bb373. 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/0df7df04-6827-4051-9dfa-530ababe2478.json and https://artists.proofprofile.net/proofs/artist/0df7df04-6827-4051-9dfa-530ababe2478.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Continents Connect Ill: Legitimate the Sessions
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 0xd6bfcb8698da8d10c31afd6bccce0ec34ed846cd12ff56dd2efc9908f5787b8c. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USCGJ2117809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7278d2dc12e3e62bdea378236738ad525e8e3ba3aa5a5f37487ddd64652eae50. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGH2286374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba18a5547f943fd645521820aebcd4d7dbc87ab96285d69fb730af500a13bda0. 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/USCGH2286375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363b98fd5e4c217897bb9cc6a0f5c959de2711a7e2e30bdfbd1036f7860b3f64. 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/USCGH2286377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65c57979572a9acfd0a5a98806c29f9b0ee86223c1ddeb6f074812e1f09c145. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USCGH2286378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef308df895240d65e8ce6c0fc3ec3794a938934f0754ef7a542e37f4f1ecdff. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USCGH2286380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab28d60aff21b18250838d7640f6359d180b1a9f0315ec23fec8b38bb212f10. 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/USHM92208242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71612188bfee508ab80d3bd88494673eb193076a8faa9e458f416b8c796389. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM92208243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9341eb9b858b426826c9b9930cc002dae9fdc03a38942d0ded2b5fce99b1872. 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/USHM92208244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3bf52a5a95d5293eb9cffe99c588958a8cb5fdf3651817e35dd8468e618a15. 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/USHM92208245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9104ab5145209affe71758de44d0692842b16162a6d4134b048a0a5b16292. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM92208246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad3a33426a0d7676a1984b686815709bfae9c3c4c0f122c4a2623a7ca9efef2. 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/USHM92208247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e973b05a77396bfef161542ace1b825d5d32d83feaa8e644d2dd35fdd87e889. 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/USHM92208248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a23f5c5f8878450894ade9218959b857fe20434af11330cda5818bb29be6a55. 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/USHM92208249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04f420b6561dfae5c3279b415a6a08c5ab0ce666c9cf085a67a66dd50c0707. 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/USCGH2352569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d75b6e525e8ef0aa443ffb073d4220566469c7a1926c4ef839ed2dcbb8a41c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USMH92395117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275cb7a549450ae921feefe1858b717e338938eb2c558d577ae2663db8f8a3e1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USMH92395119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77fcae52f210964f0b10d8c7bd6be1c0f1cec24f4717ac5bc1f094a0fa94e2b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USMH92395120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2dbb73995a1c0532aa560285ee55aca3c3e362414657127769ee0a14159583. 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/USMH92395121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d7a4e1df16d0914898b3b4101cac1c1a7ae97300ce0816b923038f951868ac. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USMH92395123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ae77b93e8830f5433a32004097afaa9c1cfe162bc87564f0952c1cc05d0f38. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USMH92395124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce09504adff54f789957b51902e61c6ec6ae973c745d568232cabcd3438aa64. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USCGH2441734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878e867bbe0550912a77e133cfbb4a0f725d59e6c4a4c49ba259ea651f0df0f8. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USCGJ2413813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5cb35d2a65d0bb55f37258e080e7dfe686a9d831742877236cf1081d9823a6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM82430827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbe3560848ea68e5eae872b224bb9e470dbdabd6f96a26a3cefb66a92080171. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM92401516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bcbbc339576ad36d26ee25fc569d9c5e554da351eda3130cd85c26b766012c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USHM82489902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f05188e774be0fa08484f45b25d8e1d1c17742b86f6dd260f59ffad87a7b43. 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/USHM92477414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41c5edb3d26d5285b0f61a8fac684314e699359944b89a268618003da943842. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USHM92477415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08e5b235cf8eef0eaa68fcaa508e09b1eb47abd6b7ae33a22397dd7883b4924. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USHM92477417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c93a666f733335e02375a5ee6ab263692e511e0196ff0504a03a2f3d5c3419e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USHM92477418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309dfd93fe7c0ec2fa2e15cd99b9908f24b5e72f4d687ea4d80cafd0a2de9608. 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/USHM92477419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142629c47b56e61a9b5ba30a5aec8fb0745e9fb0ca682a07e8e04ab70bc63941. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM92477420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aeaf3caeeb8a102f8ccf1d9e9021dbc8c4aa49605e9ad898c6c72d48d4f628f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USHM92477421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec5c488b1a88523d11d5d1135e96782628e4eea72d425211d21ccfec218932b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USHM92477423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d5a92da1747c11dc516514010b6e9e7c3f987be0ee88c4f97b2654a785dc03. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USHM92477425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ec86e3f9d2437a679a0e81638ca5375f2f3d8053be8f49355f4b15b7d102b3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USL4R2499588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdb91543c812b3394538cf30a8aaf6ab3da6ee8b3b9e969234acdab382ace83. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USY242476797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce17da62bd96cf18a44ad070d99c324d68231c3b84ac7a3e20513b57daa39f2. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USDY42584051.