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 0x637189d65ca941d64568f7258c9e1a08749fc2d08fdcafe53eeffadee960dba5. 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/78b000c0-dad0-46d1-911b-a0065ae4b64e.json and https://artists.proofprofile.net/proofs/artist/78b000c0-dad0-46d1-911b-a0065ae4b64e.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 0x4237e1f37f028b4c7205d9881989ca6e2cc972f79c4663c13edbc050b8ca4b07. 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/QZTBF2434751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe50bc083c5e8764bf6eeff6684fb9a835864cc446f851562e9b0742c7b2325. 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/QZTBF2434752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640493ca47881f9a450c8f2aeb9c1634ef78a29ffff185288c3c8d1c9c18b13d. 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/QZTBF2434753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fde090e42f46f7eb0559b424b56b95d4b38f8d563d1094a406398b9fd9e825. 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/QZTBF2434754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd21578dbab2dc519b63fa23b063e48d28040d5bc50ec96d091d1af64ce0cee. 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/QZTBF2434755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7e25cd78857ea74acda6c4d7f52bfb089596e2f2534d36afbbe089880630ed. 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/QZTBF2434756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77612bce3bf7e8285e49e00c80fed039a171bbe3808f7ba6dfe4f26c741ee686. 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/QZTBF2434758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c66afd591837557eafc32f0e0c6942137502805e91d40fe16c17a04849dfc9. 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/QZTBF2434760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48dbf7e9f45f9d0436d7390df2a8f34c2e1fee1a7be504d82d8ffc150f263da. 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/QZTBF2434763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a693583dac023d1d21815444df4dcc1d23bc5165e4dce74a044e203a5e22ce. 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/QZTBF2434765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32df2771a1564655249dc5a1b5061d33260e999c2a257ef6c0fb3f377873ebcc. 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/QZTBF2434766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a301ac7e2c45a3d16fe8267a4f014387a4ded0b5b47637bd9ebee2513419145. 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/QZTBF2434767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016e333955c41629598d5d2702c88eeb140131038d154891707cbb539d6350d5. 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/QZTBF2434768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63545fea281315a6d68c22f1d1ef8c484138aaaa5ef7d0420d226fa7ac89dc9. 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/QZTBF2434769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce2176b8c5cab7314822ec3c0702fd66031ca619aabea937724e4e6b7ab41fe. 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/QZTBF2434770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e929db0722e7cf32b29b7f07a7c6fee9568e215f81a6c564f07ee7895a9bda. 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/QZTBF2434771.
Nerot Shel Tzion - נרות של ציון - Special Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee52ee081ac71896ffaff88450466a928ab72216c1c73164519d44d2cc56a6d. 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/QZTBF2434772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944083eaf29835af443dce0fd482a41874b17832926185dbf5f70cff8a2b6eb. 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/QZTBF2434773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3803c30fd8331a7a84d41bd1f3eb5ff756ae2db3fe5d561479ea2c982fba3. 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/QZTBF2434775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f859c006a77caad60c227096cfe11fa16d8782f2e67916c61124ae015455ca. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTBF2434776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39732c00fefeafc1cbfe439ab70fb5bcdd84100536ef71b7b742b9886c1ff5fb. 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/QZTBF2434777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdf95d46f9d0e05c5e445ceaa296c05f8045bf838af98c540c86cc2083ad601. 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/QZTBF2434778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eee983c333058935b931edaf748d25a24ceddbe3224558e5b1601ca6556f80d. 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/QZTBF2434779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764de13c00271c971b76505b211471ba150618e8d2d31849e2832e4282bbc5cc. 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/QZTBF2434780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d9b1195d37c0c013abefefa46a7adafa21a1df9e35dc5e52160865beefa6f7. 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/QZTBF2434781.