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 0x6b675d105c1d28de7a3ee29c59ccfb4abea61ee33fe5b54c55c20c592aadac3f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65f16ada-a6d0-45d4-b451-3ccffc3b9e25.json and https://artists.proofprofile.net/proofs/artist/65f16ada-a6d0-45d4-b451-3ccffc3b9e25.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 0xcf5ef68a430b07cef567cc54183ab5c7a20cb192f801a4cf7717666121ef595c. 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/ES71G2209152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e303ab58cc2a902e4aee21b000e693fd4f068afee44302e5e0ac1aa17cab01. 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/ES71G2207228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e06e00ac4479f308634c74dc1c08a303ccc9f8c0ace3e43f601fe0cd2067de4. 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/ES71G2211192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5d22284ea3fae4e2abd3536cf8d6c3c77654714ea510104134dc6a33722cbf. 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/ES71G2211193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cbbd8628a047de393284947405af828e401941e98122180219dfc8ecee0ac1. 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/ES71G2211194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95997aae1a6d6e9e8966854bcd248d26762d486b7ad020a13ee492c40d55db27. 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/ES71G2211195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1bf62474ff3df65777e445c8e1359af8e011c1636687f77ab72b268b3f14af. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G2012285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f4477a69395a29d28bb035b8a5399da5ecf60001f94bfe9e8c78b4f310c3ba. 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/ES71G2241649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a362dfeed0efdbf90eaa25a3c0d86f413fa0e2f44b6038ea21acafaacb7e63. 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/ES71G2248731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f4477a69395a29d28bb035b8a5399da5ecf60001f94bfe9e8c78b4f310c3ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2241649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5ef68a430b07cef567cc54183ab5c7a20cb192f801a4cf7717666121ef595c. 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/ES71G2209152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1154ff9221873ce2cf5bbc765a0b2cde538b2e9c704d1c6a128b0400d7c23f3. 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/USCCW1610980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433717af4cc37ad734b94a18ecbf0a7bcc53e5741ba325f9150d99fc691c1d92. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCCW1610939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066fee612eafe68eb71d34ead3ddaf719f90cae50b9168202967349c95410f7. 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/US66W2202184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f1360a76f23af75a87ac9df2071bb591af02b8add2ad7cf65ea1866fe64426. 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/ES71G1831845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492e6e396da02f5a9b1af65234e26b2b55d11446c102b67173e01501fdd53db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCCW1610885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e5fd0bb5ba8bdc38a0083ccf8f1c3b0125b84eedaa4ce9dc79f9d24a66d69. 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/USCCW1611162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3e6893b3bf0d51543a1f9b90fc79c7a711526d5f245281737babd9198422b7. 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/GBGLW2100170.