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 0x8655a5fa8ca622a3231d2ce9aef8910aaa57aab1a6ccc6c774793d536729fb4b. 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/42566e0d-f975-4bfa-acad-9f6ce391cdde.json and https://artists.proofprofile.net/proofs/artist/42566e0d-f975-4bfa-acad-9f6ce391cdde.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 0x72e565aa3221379c15896f3d37d61de49954b876037f51502e2409dd0cad7581. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAX2327426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882858b8e3af3997b2d713b24495993c8ecc3a79e2730c53faf5429afcd2116e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:59:59Z), 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/QZTAX2327427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61a9885379ff469591ec85df5d863a46a45d6e12a10bd587836d89b60bbca97. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAX2327431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ceb2c699e144670176afdbfae23a0a0ea4a2546ed744ac64d892be3912bfa9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:14:31Z), 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/QZTAX2327434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31540f8ac9058a4a6f2c4e5124717f854cd65a3f3fc7da721bc88d1cec2242fd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAX2327435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa622be5cd8c107425b00cde9e136cbc4876484faadd099a825330fa24cc86403. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAX2327436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f2ad8c4ed2f46b113664896b7dc88df5352903b87738d47778318d0b1bdeb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAY2329116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02b139acb23e865c1bdf3f4bfe2d4edebd4f0302bda65ee48ccee57b4c8fa80. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:16Z), 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/QZTAY2329119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2212a2550e7c41699e8b057769325c3ef07f192d1b22c8c9c048458759b6c6b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAY2329125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff5ca246c142dcb0009f2d44034d474ca10b7729211a15fa8dfdfa986db531a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:43Z), 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/QZTAY2329126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9399b6d77ca679f733218ca6e287ce51796603e1dda435f645012eb18a6d57fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAY2329127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dadca806bb5bcc49c75160f0e86e8df18b41b9449f0bc9698b0cc3ac15d91e. 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/QZTAY2329128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e19041081c218df7c4ce0e9aa277fecaa962b5fd6765e98cd5fcbada9c3bbd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA72443800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd870060f88e76b43621f7f7b500ad0ef247dfc21744e3fbdc6e02e3b3777a0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA72443803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57123ee29598174029f811e0a1834f119b68b0ed84bb61fdf69268fb1c225edd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72443806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375093fc249bbfd8674c0671c9b8f8156d22863420fe8e2b9688b98410a7fe0c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA72443808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc342082e49ebd220b929423717d54f1014fba56f0344d3e87e30897c38620d05. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA72443810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5401a1d60c0ad3392bd57ccdd111749a0b6db0fd5842b139b9012fce104eb93. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:21Z), 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/QZDA72443813.