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 0x0d35c02c558acc8885797a43e48e9a238ad83b86d198fdcb8a21018824e1e91b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9f5327c-31f7-45c8-bef1-d9e8f53c9597.json and https://artists.proofprofile.net/proofs/artist/c9f5327c-31f7-45c8-bef1-d9e8f53c9597.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 0xc290243d0a4e59be8741ecae25685f1ffc4cba4ffdaf7a9be0f66e8fd9559f65. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX3Q92189555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7e2ec0c8d8ecd3baa25ecb786a90b847abec13fac51fb7d3eb49b06ac9cf09. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBMA22495803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43097f51444501b28578caccdc22abf7abd2313ad1f03274816ae621a325cee1. 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/GX3Q92414542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73428c2909c0b06b444e0926eb4ed8cf0ae89b51ecf1ea44e4681d033e009b27. 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/GBLFP2474473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc397c43fcb187938807177c87f02ea880e4c5b78f31a20e6feada396d536cf0a. 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/GBMA22311140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0755d8ea3f012309ce3af2811c31c0e13a28e9545d97126a482d0822bf8fe4. 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/GBLFP2392119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37621107937af2f37c30779db82e01b830c415dbe55e2c39c4cb3ec6cc4ef4ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLFP2359199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900a63ef8dc5085a689ae465ad64f5f7066c5b73be25096c328f3ebdc5a7a51. 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/GX3Q92344304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f1b1eef3c55ab230862e5f717124f4f595c83028e8022dbc4eb09c08c6834a. 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/GX3Q92204927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef93e25bb9891287ad0262fcc86d3657d0bbccb1a40a7f082331a89305c18c12. 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/UKXN22244514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74befa96393aff13997a1f74ba92ed6f7b24bcab76f159192a9df483b68da59. 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/QZK6J2248505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf768695503c4379686d23686296c806851ff900315bebb44f44a58502504c00f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLFP2223612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6834eb4d16a5120959f858279a90e5a6d20aa9414fca85e846aa51205d05bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX53U2029970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793de4ac4e9baf2d6166ed3b8757b5102b3724b0175ac8d1369eb67eee25cdb0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6F2167843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8011d300e9de53262d785d36d8c483f7af76439a9632c84aac5f1672bf4487. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6L2060097.