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 0xc63634f2e2564ad404403c9e2b3ef643f0b4b0cc74b1f450acde9d4b01860f65. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/162e4a50-c6c4-463a-9100-ec1907a7b776.json and https://artists.proofprofile.net/proofs/artist/162e4a50-c6c4-463a-9100-ec1907a7b776.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 0xe3cb343dab82963bd5070a770f1b6a03d21ab7440bdd3468385d56c373836bc6. 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/QZ22B1921273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f231e44e0d14813e4bfe0300e1bf799688f513f9600b29f0722da8b5b116ea. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ22B1921274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520ea144775d8a5be4f612833aeb84d04c920ab25097ddcba712c48a08c8e842. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ22B1921278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39efddfbc692ccde8213877bb986704aa5f8395b4ed03a8c62e44fd76b92b6. 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/QZ22B1921259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec030cad1217554b47fffbb7f5f22cba90d4e4ac408f7e6712fc955618a9f0c1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ22B1921260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3e33945c874bd27787eb8b9f4f72018e44ed801005b5e42fe0f5ee30e17aa6. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZ22B1921261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d3f019526998af573f6e381f23f617bebafa1df886ff4eab57f27f8af23ca. 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/QZ22B1921265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98797c9a9f4fe899dbae3987611563ceb682a06e0ce86824373cf682325f6548. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ22B1921267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b07db531f33253c314843ce0b882dd4f09487c76d510a693958b177a0e9fd. 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/QZGWX2060171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d52291b3e7e5187032df384b29d762f0ca505b60e2af7266ef8630ab39fce37. 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/TCAJM2579651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e6ed5c79973db903923093c3d3edb82670c1744307b934c54681bd77a4299c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:50:54Z), 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/TCAJM2579689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10914f3db36e3d57815eb12f4d33a22b1ae9770351dadfdb3097ad849dabe8b5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAJM2579702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b71f8a3dcdc854c05ac8af14836453fe8be164ed1b971ba921a647bbc8af5. 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/TCAJM2579717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f6a5637f5747d1749d459117ac5f1fcf87cd37a345dab69e42770fea706a4c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJM2579727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82aaa3a668c0a9ac2b1c7a2b3cb304172975d273f007911c3c01521a3aa4482. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJM2579733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc298262caf25c397da28b782dd3cfd984932e95ec32485e1f68a6ca6ebe2d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:18Z), 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/TCAJM2579740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822054b3b6e0586d2dad57ab246f36892f76e7f8431d5187d2dbb0b8e011e1a8. 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/TCAJM2579743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1514cd37e9fa592c4557dbbb07963b8d288cfae7ac15f639a5435a9f93135205. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJN2579747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9f3d5b20653177ea89a1fcac5304b5b5400d5a01f235523e2dc5b67a31766b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJM2579750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08985f5b8dbbf1a0ffcd9031b13e4d9ebe6f671bb7e631c3eaaf51098d58c2d5. 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/TCAJM2579768.