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 0x13a5778dee223904d52a9ec09c9f3a45bf7d0e7ca353c02b91f720304f0b074d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcca96a9-626a-4ac2-baf5-34e1510e4cb4.json and https://artists.proofprofile.net/proofs/artist/fcca96a9-626a-4ac2-baf5-34e1510e4cb4.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 0x5e3eb939ccc26fa83713896dce9c50385e49a72bcb32f14202465a94208fa8ce. 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/QZW9L2321031.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dd2240fe930c6283afd582cd45d1786a2068dbba93b3f9ca59d9a3c380a0c5. 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/QZWDD2570280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e305069473dec2f49b9368203696bda7cf2a9e4a78ee3be9d72586e3bd47c7. 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/QZWDD2570295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72380e9ec0a625f286aedb5db5e9807cc3c4014abe9dc909106d848d409b2273. 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/QZWDD2570297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ff37c3656c50593712bb9188ab93e909b74be1083f677d44f702e67d8a4a0. 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/QZWDD2570304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05c173c5e70166cc37fedec720c6afaf8e6c713610a8a496e18980de16ba9b5. 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/QZWDD2570326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84d76d2060b66b759f97a8fc587a7bee8c52d0667cd9307d568b884ceba8fc2. 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/QZWDD2570330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e02927defdf8b3a4436aba7a7ab9ac1b061fc6a974eacf1ad218bf97d45ec. 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/QZWDD2570339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79ca2f0a7680ed548d5208a5e005086c57d8e1165ac955cb2c7120fca850054. 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/QZWDD2570357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46182c5c2d5781f6a83bff8aaf354cf51e9b60867904247292e60a731af84ce0. 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/QZWDD2570358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f1ea6e1e18ff8f535bce88dfa50aaeb1be7bdd84b8f50140731f894be5634. 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/QZWDD2570374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a6fa001c84547d1aa6faf1096bb13748bb8093e9aa5ca655896e4321d4ec60. 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/QZWDD2570389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcc51830048fe1691ef43d366f5112fe25bcbd0dd81fb9b6cc1cd26962de327. 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/QZWDD2570635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d000684ecba471f6991faaffe004da538ce5826ded8bf77f91cdec14eb67a4d. 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/BKLL22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fe1b6325ddd89cb2d461701557019302012194adab5eec620c1d9b8cc388d3. 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/QZGLM2377681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02882dc8f11429e81a433b31e55d96aa8b823a77b8fdb532c1e325af70d4cd92. 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/BXIV82185647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7b74ed464151572fbc0b40cee0b10ff67643ef633508bbcaae4a82e338441f. 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/QZNJZ2316592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0400f174f427efdf640aa66354e628f61764cccaa9f9ab0f75c2dd9164d052. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZEB2488766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa593507153de7099e1c814fd96553428823127eeb9066c152984e83dd4df39d7. 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/GBRKQ2567060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4429e150468cb22cebd081264fbc1bab6fcc5f31fb3bd304fd6dd4fa2b07b895. 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/BCY0C2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc295c837c9cf10417a58de7842aa5481b87dab4c330558d46c6bf8c4e090f3b5. 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/QZZ8B2439183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf18c6d7cf98768bfa2553317465451b8c5dded0c0a9770642371a5c9746920. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC2GV2400060.