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 0x2cce43666bf1f5e6b167e91ccd7a93cbacceca063ddcea7d476e056a299f19e3. 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/5ec44244-30ff-4652-9499-22650464f799.json and https://artists.proofprofile.net/proofs/artist/5ec44244-30ff-4652-9499-22650464f799.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 0x34c2bc5caa83804082d14090dbe7441c348d00a9c729173b8d06806610cc74d9. 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/ES6612100752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb25e816c69635da028dd662ed68034a29df0876b68d094aa0c19a86147f6eb. 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/ES6612100753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01669e921d006c9b29081820eabbab706bf90d2f0a28724a2c14075cc63091f. 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/ES6612100739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23b72960ac516bc734b8f5d5c508c362bcc393028916c392b92f3063db2bf34. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES6612100754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac68dcad589a1f8df35d6e4390b9e27042a3a471e59d8d9be7c22ffd88019aee. 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/ES6612100755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4640b279efb1ca1ee6ce49dc406425b4ebd0e01ad2f8c992d8fd6fb1c1bc95a6. 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/ES6612100750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc142906fbdb1f1c6826bb5d230e18b24432da45303ff3d494937c7fbf3aa0. 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/ES6612100751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdfc085ce959d4f0e6494e2b15fea4853f22415cdaf0bdf8867cda1958b8ec8. 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/ES6612300771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b44c7d25277c09952cdf59277ad7aa38fdfbd5ef6389f5c063fe176f30ba7f. 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/ES6612200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc142906fbdb1f1c6826bb5d230e18b24432da45303ff3d494937c7fbf3aa0. 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/ES6612100751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4640b279efb1ca1ee6ce49dc406425b4ebd0e01ad2f8c992d8fd6fb1c1bc95a6. 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/ES6612100750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01669e921d006c9b29081820eabbab706bf90d2f0a28724a2c14075cc63091f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES6612100739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371772f1e27f25e3bf4667269693297b664b9889fff2a22bc1505f512cacdf13. 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/ES6612100722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a767d05f0d6a0f3e3622a5fbb370cdeb0c84d91926f4e952be8f7938cc1e91. 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/ES6612100720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff53a8fd9571ddbfc4ec640333d049143168e381cd03cf1097abbf5d75efa2a. 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/ES6612000713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0decb4dbb765b0e68ac8452d60da1b2f26627c279630744ab92fb2d8801f6d50. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES6612000710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4610262cdd660d5c5481a22f68f9f37c79026ee9212c7018a5fdee6bdb338ab6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES6612000673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0decb4dbb765b0e68ac8452d60da1b2f26627c279630744ab92fb2d8801f6d50. 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/ES6612000710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4610262cdd660d5c5481a22f68f9f37c79026ee9212c7018a5fdee6bdb338ab6. 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/ES6612000673.