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 0xc89bde98c79c53f83aabefdadf89d4005cf21e4afcc2cc96326d8210c6a0608e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45603c88-dcbf-41d2-83da-566d5e70a41c.json and https://artists.proofprofile.net/proofs/artist/45603c88-dcbf-41d2-83da-566d5e70a41c.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 0xed1ed6a6ac4233cd028f481f21cec473060d970ef7ba7a398dee864eac163681. 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/NLRD52203619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f0312011bc80d81459a37a79322c7574c795c38324a6592738f256802da2b2. 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/NLM5S2101190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9887c61fec7c42f41e5f17519de24bcae84eda3b9ecc448d4a58b0c1c0071557. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFPL2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9887c61fec7c42f41e5f17519de24bcae84eda3b9ecc448d4a58b0c1c0071557. 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/QZFPL2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d7241edf089f08fcd635ee26efc9bcbc6a82ecfef8a4a9c8dcc704ab27b2a4. 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/QZFPL2100282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb74dcc2f52e1247980ac217a64f5535139fa3ccb5ee0e77d1a14cd015c2594b. 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/QZFPL2100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7cf06d1261d1755440b36da4f99bc497467b424f9b5cb1a6a83a6c9d2ceb6f. 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/QZFPL2100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb74dcc2f52e1247980ac217a64f5535139fa3ccb5ee0e77d1a14cd015c2594b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFPL2100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0647a2ac62da09494df17fac0fe0e253d7b5d1b493c61b7b61419c0b8843fce1. 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/CA5KR2367410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d7241edf089f08fcd635ee26efc9bcbc6a82ecfef8a4a9c8dcc704ab27b2a4. 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/QZFPL2100282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c21f1e7f0c5310045fa1e551d6bc485e628af774703cb25e9ee35dfdec15f3. 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/CA5KR2251906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa26ee6ac8233968b641596af88de86c73b643efee013eb6a1f21e2ee2b3936. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2222082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e411af960931d3201a4c2ffd7f09a8a85ce9f24d7db52a20305d2498709e4. 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/USYBL2201052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa26ee6ac8233968b641596af88de86c73b643efee013eb6a1f21e2ee2b3936. 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/CA5KR2222082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8187ce05b7305667a5f6efad492ab0f208770d4334786ee67a719ee86eea2a5. 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/QZMER2170338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0027e80fc5239ee1816d034352842f31866ca8d905caa5beace9564aecd1c19a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMER2170339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527334f55cfddcaa27e6f149521b1eb67688fe9f0805ced150155f4471780462. 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/CH6542150256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2613a215acb11e6cddd1e3ca3bb36bf58b5cdcd06b2dce6e229a6174783d230. 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/QZES72110310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d69bcfa856594d3ac0891896d7711354f5d8213a8084a0a55e25e33b7a5ff4. 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/QZES72110311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617d7add7f399134cf486068de41f71588abf25aab82bf2b70cbb2fbd4728dda. 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/CH6541645998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6cf0074978bd1170382db99813ab518e60b6e565859063b181790a0ec55cc5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6542089849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bf24c4461aba3a7f998a851690cb03c9b162a6b0b9ff867b29bae5024a8c5d. 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/QZMEQ2177488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ed6a6ac4233cd028f481f21cec473060d970ef7ba7a398dee864eac163681. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD52203619.