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 0x4d88738a5126d31c5610c9dd86a36f8876f8581185d987d7a15fc77238257e79. 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/9c4ed5ac-0cfe-439f-83ac-43f15b366287.json and https://artists.proofprofile.net/proofs/artist/9c4ed5ac-0cfe-439f-83ac-43f15b366287.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 0x30066254e61c0b99d8ad2e8294948b8dedfefef548f1b2e99d394ad8a9abd547. 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/IL1010004987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5927aff9ddcd83c3e437a4dc0bb3903862d339ac446ed649bcbad005290ee0c. 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/IL1010005406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cd7091dd4b0a3e05295e303ed2544f8f9582c6f8972ddf7a7ee27b29242461. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IL1010004279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cd7091dd4b0a3e05295e303ed2544f8f9582c6f8972ddf7a7ee27b29242461. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/IL1010004279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa23ee920d5371f52db84944d4e6688415292336405562111beaa95c41c5b45. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL1010005399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2438a89896e2724d255d9263d499c469c4e345435910c96294de45bd0ca2c610. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/IL1010001485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1345642f2e714f0ece3dae6c07c5ec681d6f95d135c7004e0972fdf504c53619. 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/IL1012400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4196a53d55a50361ba34388ec9989153629cbc00a1dc16ff6f4ce1a4b61e57. 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/IL1010001049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f7d4fc46bc854d323dc333a3208e042945d756a689e35683fc676535613643. 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/IL1010102009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c7796db364a3a16b38a122ff0328951d83538f5fd6ef3a686426c43fb6a6a4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/IL1010002803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51a9a8b39392d24140640915784234c39230a0bf16a82de57c4054d5b838032. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/IL1010004010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e641519f78d6bbaadd90b066768e4b149f1ba8e7c538f2f7ceb31ddae33f8a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/IL1011098040.
גשם אחרון - השירים היפים של יאיר רוזנבלום
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e1d3aea0b65c9a9d9aa354728cdcda3a5d7899d25b1b120dc0322baf3e730. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/IL1000003711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2438a89896e2724d255d9263d499c469c4e345435910c96294de45bd0ca2c610. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/IL1010001485.
מי ידע שכך יהיה - השירים היפים של שנות ה-70 (חלק א)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e1d3aea0b65c9a9d9aa354728cdcda3a5d7899d25b1b120dc0322baf3e730. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IL1000003711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3933331ede7e3a330252fa09ce44d2c5c3a5924ca3110944cf65a03ed8364982. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IL1010004702.
ארבע אחרי הצהריים ב': מיטב השירים מתכנית הרדיו
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01341f0c113f41ae6a1468161a713cefdf7826d81a79ef38bdde419a0ec5d60. 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/IL1010003460.
ארבע אחרי הצהריים ד': מיטב השירים מתכנית הרדיו
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a152eac5588eac0b94c087c7ec3204615d394348549936cd95c5efc1d0c781. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/IL1000003241.
החיטה צומחת שוב - 100 שנים לתנועה הקיבוצית
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d634769415b4de0d0a3c0df89f63dfb0073669565e11c4cd36a5e5eeeeab56. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/IL1001086080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c0f16dd4b3b6e4c66f4eac3a472c5aac42e5f981785d82bd38d6c00640b418. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/IL1010004771.