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 0xc0497cb86ec73546d656a9e6dd3b7bd7ae19cc8b8a4bcc6fcd9108fc03c8e1b7. 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/200bc998-0b5e-41bb-b192-a20ef4015f16.json and https://artists.proofprofile.net/proofs/artist/200bc998-0b5e-41bb-b192-a20ef4015f16.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 0x52816b5d0e1b97854db15e55ce7acabf6f903e2d6a0b982c63f380b980cb879c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ESA112438157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa89190be5f743adbf86f9c3dafd653da0ea732c76fa291468509885583b673b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GXD7V2451192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51072a0b8eb42303caf93b93198f7f0ae0ec6ca863e5b7036edd453bea45035. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/BKNU22500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee9e5b0338b6fcd39b2598bc4a3b65fd6469949e8101d5491394bd4a97beab4. 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/BKNU22500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a6ec105bdfd65fcf638c2fb7dec39e47b7e2ee5fc312e252c36218f936657b. 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/BKNU22500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c95885c38e092257ca578920b433e1f6a6711b474f981fecf7f3948d9800dc0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:41Z), 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/US7VG2583982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b0249a27f4c30b045c53d773fa1f5f5d38ce84db35287069e070c3d7fcd826. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BKNU22500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc25d0b32414ac90e1e064601c763ed081c0a4450308754aa81e71f75c67ff. 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/BKNU22500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966661598fd497345840c611d945202ada3a18fa9a0da31e32b0aefaa38add8a. 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/BKNU22500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f8663602d37ac9eedbd7d3c8a21cc14116a46cecd5cb0379e903d390627c1. 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/BKNU22500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590e319cf967549ce80fb6a8c984708a51235c88d3b3ccbd8fb171b2102ec603. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BKNU22500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bcc5aa8df0452ce7496b5fc60ba5350f356eacce2ffb76906b7feb6b8a30fd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:03Z), 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/BKNU22500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef30fabe7dec118b836dda8d4bccf27ff9581557f64c07395436d127330e23c6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:52Z), 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/BKNU22500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37af01764fe2bfbbe052ec74b40c562cbdf5de353c68a84878f0908641d93f5e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BKNU22500432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d282ca0d7e77a8057407a324eef7308a39a48e8d76cfe8093f6b096d4a695e2. 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/BKNU22500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb698a02595a13a527416871d1da41846bd7dac942b2ae5b4a96faf753cb8a1e. 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/BX4IU2501284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b3bf416c143a708038103d1b04e3e9a0eeea57b696134cf36fd4247f4ab0f3. 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/BX4IU2501282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89fba51aef404c522fa32f713f1777dc2029dd03c3628e3379c075b3eabb17. 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/BKNU22500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325cbdad30c5eb5f36232f3cf6f1f7a18bfdfcaae305b1557387a46bd2db0f3c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GXD7G2587325.
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