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 0xea36028aaa427d98506666923a95570ed39a1d6b7c1e4c166848509ff725fc92. 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/707a8064-06fe-413b-8a12-3815a3e732fa.json and https://artists.proofprofile.net/proofs/artist/707a8064-06fe-413b-8a12-3815a3e732fa.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 0xf74401134a315452a65f9a3950589caaa30a1582fde10aa9abe1202206fa3f9a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:17Z), 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/ZAC011900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a445b652ee647efdba5d0b675e05e45d92554087e127a2d9edb0a720d6b3807. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:04Z), 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/ZAC011900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa7938dfc568fd89c33a05da77651409d6864052b83f2f693d0a4e6405cdfbc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ZAC011900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe350ba725c139d7e2ed370d5ab8c0886e4fcc952ef2d680838a981486c0183e8. 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/ZAC011900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58285a08ea60f16b1de875c41e28a802569db30a8ef01f0f2cb5b77465aca35. 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/ZAA029700425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aab8d249add7e35abc74fbca9dc5e1371d4e75bc79aefe265aa831b90455b9. 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/ZAA029700426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2236dc0a0f452fff0af249ca60d88898319cffd9bb65d8ec843c3a7b519ab045. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZAA029600317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b082c29b46033ebf4e4344c99be467f5f6740b2dd4ae811cf0e7cb464923c9. 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/ZAA029600311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67a5ea4f474a8ecb18e70f03e985242894e92030fb680f7f5eccff7cb7d4089. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ZAA029600312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e9651a74ff5d18abee2f68ee21948be3378586c391f95f0187218e66c80275. 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/ZAA029600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b0cad1e4b716b7c10259bc25b6d5faa08c4738b46648695c3edc69e23ebc4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ZAA029800184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343c9633e2733b0f77eee237904c72b02541c2f83eeb5de2ea1a62a465e2792. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USV351337771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b6478ee344d1be8b54235535ad56e8f3be38f9c15a95e2416ab2eab491de4a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ZA56E1515770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a9beaff0ed87c1b8bda435eb4c3914eaa00ba93e6aabd965d767375dc30948. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:20:37Z), 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/ZA56E1515772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc229d10135d38ae2ab0f69c7082f5671032d2af15a31e756b63a6aaf2b7a74f8. 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/ZA56E1516144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de81c05ca906475e07cc3f5fdcac6009d937367ed1fb470a8855f2dc339b0bb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:09Z), 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/ZA56E1516146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088b16f94f83ac170cfe23d2eab3120728f5002705f5085434154fc57f61e3de. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ZA56E1516147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565727a42db2a6d3b2c05f62886ecb286b3fbb77f64648d3070f5c9d3f121aa1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZA56E1516148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81932b61e9cc233522ec0c819572680e49efd2f8632a3191226df4a040b39c8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ZA56E1516150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a2ae644701c025f392c47310175efe6a84eebc1611e10120ca57d88585cc2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6MZ1577479.