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 0x3fe6ac3f7ce3c35bcefb218857794b91fca7e53661a221bca93a5fc9a5faf97e. 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/58e97e6b-feaf-4b76-ba59-8e27baa8ea3c.json and https://artists.proofprofile.net/proofs/artist/58e97e6b-feaf-4b76-ba59-8e27baa8ea3c.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 0x5f39c440742016263900c8fd70245589497938a6019499927e16a3e6ece0e2ce. 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/GBSMU6741041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd731d9cd76837e82290cc47f85e56a19ec0068916ad3e85f123e14369eac31bb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBSMU6777717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6176b201710be68f3f4e9a027f832b0c146cc2f88c96b7cf4ef6976bccebeb5a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GBSMU6741194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87db7711e1b79e3129b51bde78468cb39efb58d9a66dd0613d060ebbf55f5377. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:26Z), 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/GBSMU8197763.
The Fortress [Medieval Rock Song (Violin & Electric Guitar)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b10f7ac85c9c10217252f3445fc3300f54ba9b441b90ffa96e598a6d485e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFC2078544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d94c18917d1dc2bac8694e1812dcf0c5971b04ebf16b29a06914d0d378f0c9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAFD2095485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3328689e747cc1d2394b130e974001e0874474a9fc0de063612ce284047ff4. 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/TCAFD2099385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3328689e747cc1d2394b130e974001e0874474a9fc0de063612ce284047ff4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:18:27Z), 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/TCAFD2099385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6173b1979e6dd0ece943a804c2dd2bc3c626a21eeb5c64f9ced7be993b50ca. 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/QZNWV2067248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d94c18917d1dc2bac8694e1812dcf0c5971b04ebf16b29a06914d0d378f0c9. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:36:59Z), 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/TCAFD2095485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35d853124d6e0b9919631e9341e1eb49c85302d7ae5ab49a966248ef8590b47. 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/QZES62166327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4986e75742ad0f58d7550abfe85c8eedcf9c27127aa21983ac81dbedd6818419. 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/QZES62166328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3669213efb384bb387fd1e25fde2269fc10c39aa52db9b6bd47d9e1cdfcbf1c5. 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/TCAFJ2109501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd9cb5a4fa7e16f6ec3bfdb905518cbc297b7c3043198617f3ef74e38d8f9f0. 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/QZNWV2065823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232c3b93fcc92f29f0656ab82dbfffc47d525ad2949ca01165683a7e0ff4f1a5. 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/TCAFF2004342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8aa38554c253e554ed33ff14b63f6b67ea4d5cc1c34caa0b3dd87059739d6d5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZRP42290610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f1c69759358fb93617ab79c396f16a3c85a5d367bf5f2e419bfab4cbb92141. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX89G2465448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464c98eadd5893fc4bc7310dde07ed67e3f9c4ac715bf970b983bf963d60c230. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:31Z), 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/GX53U2493376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655c75cd6905ab24bbc5ea1c430782652e8affe5b816324578cf696fb8dd0daf. 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/GX53U2493379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba61100fc0b209ef12b10eb392bc234fc10e5473e70e376806c2c13846f10b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXF9Q2565000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd384bf6aaf6c43b3f10d4633594562edc43d7891b3bb9fec726481ebbd7d9e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:01:41Z), 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/GX3Q92538847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892cc1a152f9a033c3f9d91cc62fc6699bd5d6903efbaa13d791b667c378a468. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2511463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3090d9c960079713d9d3a79d557f05af1898c8280b4663b9c7f26f1d73980d4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXHAF2574524.