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 0x7114af631f1b591e92799bb646c3b7ce0a0ea7a2a23d058b621b5fe22c98d095. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5588b98-c0b0-4b04-8b84-430866fe637c.json and https://artists.proofprofile.net/proofs/artist/f5588b98-c0b0-4b04-8b84-430866fe637c.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 0x6646725f4b866aadbd9ee9f8035a224fe83e596f381fe23ba9dbc9fbb399bdbb. 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/TCACY1777139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b95a33a85149482987ba57a71d447618ae726f88f2ecd3a9e51b99fb15e15c7. 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/TCACY1777144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cbcd2d57de27e4c3b96b067994ef2cdc64a40dfe2dcc8798c9bacba9855577. 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/TCACY1777146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0093f3077c9948212048ecdba4b03bf715a0c654ec2cfbc7ce044dac4ae662c1. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCACY1777147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a1443b202a17b9ec8198d2648e985e2398bc42434a0d47335426fd1632583. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCACY1777148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21186c8e5e40823f5bb153a64e04dc021b6b51e6c14d55cb3f0648f45f9a9641. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCACY1777149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1186d3e82cec40f54daca2af202e0cfbf47f36f2d825314f0dad48cb9c4ae3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:21Z), 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/TCACY1777150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3e3b12e1aee00b0e4558666007855af558fb814b5c3ef838d34bdc2b60fd9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCACY1777151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af148e6cf65dd7cdae7aac2d5546a874680f722dc439fe5f66af036bb6940d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAEG1947481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79426bbb6b0f3a2a5137639e8c952f6083af61b98c467dc2fe9e4c191df15fd. 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/TCAEG1947484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ea1edc4aa587dff3dcc82a0a7ba44430fb0afaea1bc18599591f4c95ecb40e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAEG1947483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c6bac4ced3d9a76f648f5b8776fe9dac363cf69ee7c90ea3ab41bb16096703. 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/USLZJ1976063.