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 0x630c08ed33e240aa0f38707daf99140cbf26980d91eeebd2aeee269c662441e7. 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/20826c94-afb8-4af9-92f7-c3d1cba35478.json and https://artists.proofprofile.net/proofs/artist/20826c94-afb8-4af9-92f7-c3d1cba35478.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 0x53603f003189a7cfbd7150471996ae1a814857637e8a2dbb062f594c28d7b4c5. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/JPB671602555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1fe08ce39632acde511095f45ebbdf50a2e69ec76e39f3eb29cd553adeb203. 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/JPB671602556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81fc13479208a92f11abef19ed963848b010cf89f29e01893db69d215cc9dc9. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/JPB671602561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591812ebe5bbe7785eeef3ce523ebb7fd760d3fa47dcd63844fdbca1d34e8000. 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/JPB671602562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d061cd86804310b0b4777baeb2ebdbd75aac18b5b7027d702e6148772e8b6b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPB671602566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ceed9bce803a16a319a52318f357d6212c64bb936971f91209e86558ce3384. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPB671903595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07648b9345059ff4d9d85e7a6d6b5696bd65fe24462e189ae75919bce8e82eab. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QMBZ92000557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc583b44ba6e691f884c563beeab1bba960f63d1cdc56ceef0ef641372ef6c38b. 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/QMBZ92000558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e4c9c1f2eb0c6929c6b14024bf86d2722774195a1f1cc6e7f663c782208ee8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMBZ92000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b223a313d60a571217a84332ac0e6543981189bda0a83e3314407155469a29. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QMBZ92000565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07648b9345059ff4d9d85e7a6d6b5696bd65fe24462e189ae75919bce8e82eab. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QMBZ92000557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc583b44ba6e691f884c563beeab1bba960f63d1cdc56ceef0ef641372ef6c38b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMBZ92000558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2842fbff98ab73f9baa81c0d5415a189424cfe2e6ec8a630c69a061667d4277. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMBZ92000560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e4c9c1f2eb0c6929c6b14024bf86d2722774195a1f1cc6e7f663c782208ee8. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QMBZ92000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c8bb385fbac13f3cba34ab4a60d0b258821dda2b9c0e57f144a1b7d89f7d7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMBZ92000562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542cd35a18df8dab13eacda16abb9279d8d23533632ea9a2c245c178006ba83d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMBZ92000563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e040c61a52b33a87e1c4d8e71a827e735c9b2a8639ffe058874488f992bfb45. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMBZ92000564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b223a313d60a571217a84332ac0e6543981189bda0a83e3314407155469a29. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QMBZ92000565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd601c713cf6183709f8044f21665fe03a7baf7b4e25bda539fb21b5e87668772. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QMBZ92000566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a427962dc153399abf9d6ef474ec2d68ae5dbb4bd6dce05c1c6d39d850e01. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCJPR2286637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0632fe11ba8ac477c80f9a0fb8f74e6cadee3ac1aacaeafb411d9c544ba64e9. 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/TCJPR2287644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c95ad17ab52a1a0d9b46b06947e70e14053cdd53d1357e91a630aeae3dba025. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCJPW2354534.