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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38ecf980a4d2b6991fda5330d7dd8d8757b6bbbf6ceac2d69493f45790679c5. 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/bb91e422-62fc-4bb6-90cc-513c5d927232.json and https://artists.proofprofile.net/proofs/artist/bb91e422-62fc-4bb6-90cc-513c5d927232.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90159c2b114ea89bc3c8810233aadaf3248078c1261759bcc8e1d25f868d8d04. 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/NLT2H2300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50c29f192a2896ded11d37ad26364cabab2182909900b34251dfcb943e7cdc1. 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/USA2P2232940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1b4baef14e2ef68148faaf56580b687bd51f6136c3e21bd34d3c10e1f62673. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2314201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ca2b1660348b5395d28fbee39702f370ef0e1cea511d126bd5e54a86ef4ff9. 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/SE3GO2309601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85f9054e1bdf2b8c7dd7d06db5975e952747c09bb30e7b617fdf31d64b2e27f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZVEM2324741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785bfed554f6a52370d80e474b23ea1937bea1429e43cec8621872e68faf9914. 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/QZVEM2316623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88f36dafa72e2657b523f8489e6e50a55da83ece5065b186c8fb0c53477995. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BE8LH2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3bb1fb2d59136c6b9f83107e6df43e5825758d3931b8027be6236735e22bde. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P2248025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0542d3713dbf4bd5bf64e4ba3c495850451daa261cd7e0a2447fbb65b825e67. 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/USA2P2212036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624702dae599d874de8185685d84726421bc0b4159227778db9591aa6bdc5301. 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/USA2P2148387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b0382fffaef8735dbac48d10cbde05e141285813245d2413d4d4008024ff25. 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/SE6XW2380126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f136241086cc5675ce89d69af798e3d674b5cc072338ae48b07e8c245ca1c2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a39574b639135965c4df39de2950da850ea0ab31d23849ab91d44b804f1488. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45b4b9d01bf63f544782954e6bc8215637defc09a6802b3b660d359e4ffd3f3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:08Z), 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/SE3GO2401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8140c129a49e2e6192f81abda7f92b990fa9f81f9f9ef6e74168322475fbc583. 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/SE3GO2401203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723c2de21d164d05747cd16d0b06a1371e74d512c6a7cb68f26c0f9d21e9235b. 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/SE3GO2401206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b5f62a86918f951420346f7c9d0ad80a0a54a7b3bde4512e834bccbfae82e3. 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/FRX452430004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8bc6797b3ac97ea94ef6ccc3523c5da1bcfbbac88be0387a03aa51ef9af7f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLX3Y2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bb2ca2abc824d120a7fb3fc09c5acad46b834523750a99b057ffc6cae5e3cc. 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/QZK6L2482903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ee6666828de8fb33e044611246c22a67cfcf2fc4fef99ba76e768250872699. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2400368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c127134d639ed9d4c7b72fb193320b41aa2669a9860cc5da1d5255444033c58. 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/GBKQU2421908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b917c09fba50ee99b104c6197dc3a962a1cf34e415709527a5868f64b90524d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0L2343807.