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 0x5539fde47b4ea6629a5ee4a628ef07f77a844b292aa1016e4f342bda417c2a21. 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/d93fcb9d-836a-4f81-aeed-0ef1d9de97d3.json and https://artists.proofprofile.net/proofs/artist/d93fcb9d-836a-4f81-aeed-0ef1d9de97d3.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 0x61380aff4f7d08ae2bd37cd8b362d780b14e3b357e8f42770464350438ad333e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU3579676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe337fbb8d74b1351b5b5e924151dd196e1e3bf3dd103f84ad929bd329235ef7b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBSMU4902067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f409a0b5c70838bfc463dafc8c06148bac6493170701addb7b7adc049d9929. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GBSMU4902069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f409a0b5c70838bfc463dafc8c06148bac6493170701addb7b7adc049d9929. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GBSMU4902069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dd5c82f91d76ab9e653a94d31c211428d6ac9000add3594db0c10378cd70c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBSMU4902156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e354409abb8fd40069004827322f19ad3868f458414387b4bcdd477ff7f8a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU6089651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3147f920fcd57ee9cfaeab86291803bba449e6fe3c3a278345bc02efba929a1c. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GBSMU6089652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066449fcd6351b58c1b90d6200cfbc03e0ae3c009232e20e11db75a4ec52396. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/GBSMU6716522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d0c8616c0d7b2848b714042e687e23487d8428812de249be75c78216d1611. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBSMU6716524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6bcdcfb72f2b6a6b9dd583148440cc68941b0c04b84d6b6f3b436806320663. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBSMU6716527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81191dc62aba07424ff906d11d431ca72ca049f1c4cc5d7eb922824351a4604e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU6716528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a34e512c7b4b16b8bbfce9df5c9704a92c0b864a0cfa84cda571227ea01f24c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBSMU8041933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004501a091dca07799cadfaa2976c583b6b6ddad8454239d8df701126757e030. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GX3HH2154479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c68758ffceeeb09a4583a267290ed108f1c75a66581f3f048383d1430fc738. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GX8LD2203531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816ccf0479a7d283f9846cb21f2cfe01d8c3878b30e06792d40152863d987915. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXBDS2381035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d2d0387606539085c0728808ca4aed57868887bb18e2cc3ceaa69bee559bcd. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ITFRN1800263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ab75d7ef5d5503fb111d492a125d70328dcf383003451e9076b0010511e116. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITFRN1800264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1622cba95f225399b4f7821cc5eee6abb4306eb193bdb3a3f07a42d2a059f245. 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/ITFRN1800265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1950337f2b95ec2c8cd113b060a4993992ad893f5be10233b79893c1ddd9d6c0. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/ITFRN1800266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf572f91130c5613d48ae7ea33ec6487d118bab9521e7ce1e01b05e1e684db049. 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/ITFRN1800269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9461529b82c0747fd3c9729b3b435bf5e8d3f76b3407ec6c5dee71b3b35dd9a3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GXBDS2431395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9461529b82c0747fd3c9729b3b435bf5e8d3f76b3407ec6c5dee71b3b35dd9a3. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/GXBDS2431395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2d1abc88274b1bcc9d2aa3dea3c8c11e72da8180e1bb269336c01a0848573. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QM6N22548607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbbc723653c66cae7ecd86716165c4b4b767433647bfe259917daad89b3e977. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US57M1919109.