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 0x73d5e89994d996478341d1159d8aac5a673c92ca34d358f9879cd645ab461a98. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf5b9361-38b3-4cdf-838a-ca8de9b06ef7.json and https://artists.proofprofile.net/proofs/artist/cf5b9361-38b3-4cdf-838a-ca8de9b06ef7.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 0x12c4f11da3791da5def6534f61ed3cbce26cf55af2d1ba138513fba5749e4e4d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPB1594615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971273481b21db4db5707f31dd36f20df5db3fefefb3a7c5030d326451d40f78. 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/TCJPJ1969178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3624f34fe6494f92cf8a29cc29aa5cb93f6381ac7c166e86c2211f6f3f8ae803. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPK2038578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b19b0402e087a22d6024c628cb765b3b4260fa2cfb1ba9c8b7f9ab5b526f8d. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/TCJPM2099146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6b84d0a2420c0467613d300928df4257f9685023b5a549930fc91fcbad6c19. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPM2099148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1d3d883f4ad41b5715b34957b9404db4ac8be981bbcf24d6401dddfde5917. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPM2099150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412adc3e400f8a465e41542c82d0ff05c2228ee587415b6465b98d8a558f866. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPM2099152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb363931c83f623f8e56e64bc065a11f7c1fe7939f38803db83ff8f9119e9c0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPR2294775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e962da247af5270017d96550d20b65fd2f88432f0be6da5010870c9b7b73ee. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPT2236829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcfcabd995d9bb65825d1741bd4aa5f79770801b3353b624ce82c7367bb8c55. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPT2242419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a7a59c1c2d25bf77f143b08032da43ce352802b2a61abdbd5ae98223163d0d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPT2242431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69007f3ac8ae5900598ee295fe98da3e6c2eaf7fb474138b279544f42d7b97. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPT2242442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9301842502fa1684627d3c51d2760b445afeb123df142285e16440963866e146. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPT2242483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aaf5d0eba4772847fef0ed09c6b4f6f09ef9b6f7b69ec471f5b9a481037ca5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPT2242505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda347c94b79549d5287958b66efcd37071c2b85023be05d5511a3c146ff684e0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPT2242510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa505cba75e6f2f97ddb43c8b0e8df410295f50646fc1496f6280676a0d0d36a4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPV2329577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f232a378e4e244dc1f834e092afe2bdf796aaefe82cce3dc41ca23337f32420. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCJPW2308826.