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 0xd6e658764ddc55a9a523fb28da6c4996a3dc11e4bf904ca542d443afee9bdeac. 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/8b17be86-b0b0-47fa-bc23-f1b0d1394eca.json and https://artists.proofprofile.net/proofs/artist/8b17be86-b0b0-47fa-bc23-f1b0d1394eca.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 0x918cbd565b27b2b8d11a41a7a4d6b17c923012f66ecc9b4d1fa6e05ab165bdd1. 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/QZS642396128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd88517e1a9947a4b0b4ab6e4558e7d86b542cf58f38cbd94649458ed0664e0. 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/GX38U2300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9ca1e898720f83c94ad69d5c3899d29935ab6032a9c3961614761832e8fe6. 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/QZMHK2340934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43bb68e1551a6fe1deaee749ecb05e17f13533311244f06d0814c19459b2d1f. 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/GBKQU2172909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1fedabdb918ec0bd45c39535d4cf264d459f0be4d46ee17c915b0b45a7a059. 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/NL2QC2101478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371fd98c8863a90869193a1210a10fda9619d6e66b6de1aa2570de6fc0685f91. 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/NLT2H2400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75c805dbc22eb607a7e265e6c328372899a71cec75f9325425b72aff749d353. 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/NL2QC2101455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aba50b00b3500017add2bfd5079f829d998bfd973032b433e6af5a85ce70bc5. 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/NLT2H2400521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479219b76a5b1b5e225b291f47d0389af623eb93e85176c3c758d37edb0536a1. 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/NL2QC2101343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0fb2af40ca4a14efafc9229811f3b6716f1bfe4b79e7fa04e5ccedf1646da9. 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/CH7812371190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0857b1eb2de55580260cf8efd74972463ad0e37c3752b59216368cc39caca426. 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/QZS652380304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b2abf76e2d735175525cb92eb246947b7f15511d7211280386e187e3f88c57. 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/QZS632345368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695a2a49c152d727535de1732872c5b15ff0c48abc863e913c0cad88cbfa225f. 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/QZK6Q2359341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910d059f8fc6bfda581416dc7b3a9a7a98d38bc0d4fecf71c2768c40e96490e. 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/QZMHM2329192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e0bf562979c32a22a82fd49b60b488fc2ad24d196ed4163f20f7e14f9fdd5b. 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/GX8KD2379449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9d8436865fb3255f0b5c0a524481d39ee8767c96102beb744059bf5ecb2316. 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/QM6N22302601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbb9a53d1355e69738e47a42e34c6deafd6a95b303555dfb24f06a262b3dbbf. 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/NL2QC2100741.