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 0x236a5998ec35d9d3235b7f4acb1f3bc7c535a951919b091a4e3381e44caad459. 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/e08e78ef-2dce-457e-97fe-43fcb7773738.json and https://artists.proofprofile.net/proofs/artist/e08e78ef-2dce-457e-97fe-43fcb7773738.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 0xf5556f7e55d00b9aaede0afda2c80aef8187b7f76c1f31ec8235cd3bf143236f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:28:17Z), 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/BR9Z21800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ff2af0a5f5d5ed5a485cc08f5f40c6a84186f7816473823b88d5a5108c4200. 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/USCGH1978306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8772990c2f73b07f6b22c35f8032110baad0377312fc40ee19b8c883a5cb6862. 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/BR9Z21900260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3856e9dc5521ba87c35594be4f580fa1ec82a2e0aafbe358ebc2bacbdc9aaef2. 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/QZMZ92472938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fe5544879ee4d22a26de800c5ee2081576b2058c8a8cf49c4bea8f5d388d46. 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/QZW9M2409221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939bdd442ed6f28d0578477fe7cd9c41e424a8f247548a8b777362d563c628eb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BCIOI2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4f01c23fc57fb2eb8e54567d6d84e7c9378b507d2e6612cac3bd7031bc4027. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BCIOI2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3e1baf40ffd9e244ae9536bfcbd726514e709a81e0aefa060805fc36f0da4d. 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/QZHZ62053835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdce0975b595fce581e463e98d8a63153ce017896b248ee7e774be61ffbc27a. 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/QZMZ92096939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f13b544a00d1b295028e0c0c7f979ac50f80748434ca14970b9818ec5a0bd3. 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/QZLL92336919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec40d8b80f9734a840d448ebfdf196e2d4e6f4bc4dde9f8b1554704316264a. 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/QZNMT2443909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eb1667b7b8a7f5624423c2c4bcd8610e42bb3e75838afb5e59f9af0812fbfb. 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/QZ5AB2070485.
Filhos de Crente #1 - Jesus Invadiu o Acústico (feat. Lookas & Noventa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e99d475809f66180ad809180d7faf6e6a40725f6c30a272283408085771d5d. 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/BRSME2302171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353cb19fc818c05b47660c2006322cdeed0c02f9f40fcd9bc0c0536cc3e9fc29. 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/BCIGI2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb8c0e04e20379a1af042769420278ce843727af10632cff3f3cec219fbd13. 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/QZNMX2390082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec40d8b80f9734a840d448ebfdf196e2d4e6f4bc4dde9f8b1554704316264a. 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/QZNMT2443909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a5ce7a2461fe2dca6a71916cbc7254862824f135fd123487963c8e2cab64bc. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US7VG2016025.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e08c395dfc22a49703b1624f568e18a1c30b1f5ca8443045c263973c715f03. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BXM2K2400011.