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 0xebf7f140a4ffe78b10ed7bdf422f3832b60ccb5554724270c0b59b9fffab20a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4f8b5d7-dd4a-4ffe-8451-d2df92a00056.json and https://artists.proofprofile.net/proofs/artist/d4f8b5d7-dd4a-4ffe-8451-d2df92a00056.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 0x188869d24723370693b87b476da5a29a05fa1edab688186c487baf2810549631. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CH6542245161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e59a86282376ae9cbd2b3fe5d2fdf0101fad9f8a0dec00a294721684f1814ce. 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/US3GD4508466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9657e7388f72545796069a9dc06946fd9e37e9b180c6a696507a819e3a0541e7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/UKACT2210786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866c1fb31dd94a1cec59b4152461b7a1ae9f4936e6ef7c9432d654ea2aa3b0c7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKACT2310051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef720ef43d73ceca071c12479a84c3878d60c67653df1233909fc98459dec53. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:18:49Z), 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/UKACT2390165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93566f796a399fbc15f30820fbd5a6285604928d1c731cca82e4056563cfe397. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEDH72300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb23a6fa066594d61183418d7ae46625616863e1c2c9bc218a7ba6b1aa24ae77. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:20:54Z), 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/DEPI82308982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddacdb06d36d4b9cb77f506317c4b68d87a03e5a7d3716607cd8bf3bb81c7da3. 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/NLRD52319487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6377c864cfcad2ac05c02fecabb622a3230d095683070537cbe7f7057dc6597. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL8RL2319908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cf8fbcad37acf938d6e3f10e4585c58c78ef044246c42b23da0583aea3d1fc. 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/NL8RL2319909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1862890be9d861c24b0c4eb5bd954e7c83f5f29f1d26c6077d8b8a100be3ed33. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLV62303150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbd1b4a9153aae55a2fa1877ebd0dda3e5232a9a009c8e31d2a37756c1bce58. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLZ542400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa5bee8777511d8273b0c87e68a27091bea72a264c7a4cc10b716c9c1219248. 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/DEDH72300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ad70fd9b9213eabfb4c02e8fc753416792705a8265313dd3731259b8e9cef. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBKQU2530111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd32957547992b8b701dd1f7d16ddd42e7127015aef435e40473829b0361ac7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEY472574419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c93d0cc83d283e39ddade1e4f4320842fdfddab8a3a6ab2b53c50757d439e51. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/AUXN22526784.