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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd21b088b9196d54b4eb5c42a0cdf89d81be7741156730adea913c98195e8a6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f8adc4a-7c7c-4630-9f75-dc1ed5d1082b.json and https://artists.proofprofile.net/proofs/artist/1f8adc4a-7c7c-4630-9f75-dc1ed5d1082b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0125f93997ce20c6a9cf0d2d16f59974f52ab42a319dcac7e3f88ad20c72fa86. 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/USASN2320067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d5eab32ad5f4351dad2c378327cb5b92cd3e873198ecfcbcb78f06babe586e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USASN2420100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9177712672a0438c97a23cf8d0e39d56ba2cb8d44fd92f60cf64eb31e8415e2. 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/USASN2420101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09ec1bc2cbb6a7d0ee451d7c9b265a903a82b7fc8a3da7b7c2d5873ec215b4d. 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/USASN2420103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0466a037ae307057823caf232a873b7c003f2e74c0c78c66e5cca5d9e74e8754. 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/USASN2420105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b744d6cec9a0e36003f96dd2a5c50b066e7aacf7c9e2502588600f85d6d024. 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/USASN2420106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96051d32e651afdf4d887570949e15196aa13f69229f9d9d2214983948a79546. 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/USASN2420108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55230dcc1a558d3a431836bd4f2562088bdeee34d0cb92eeee72cc10ce0e6645. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USASN2420110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72bc914e0998d32b2d2b63ecebcbd78f87880a87d1c0722464bd3edb23fac0d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USASN2420102.
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 0x43ded07866b67cf377347558e84359bc2d61f0a65e9dd9bf24a3fd484b6b928f. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USASN2420107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7589fbcff8383af9e74317290e37758a4bdbdb3ec1e5e31d06b6d08286fd73f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USASN2220068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe328454232735eb4863706b86c088bf2b18020a491accf78f3dd8a4da5cf92ef. 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/USASN2220069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e76023b06e7205cbf8e070979202d59c01d292bf4cdfd2a42f877afecc57028. 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/USASN2220070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe983a50f2718fe8d768da969b405f5a9b84111979083dc227f0d3a36985a73c5. 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/USASN2220071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb44f673e23c8279406f4bdd702a7dba1c61de1bee149b0a7353d510cc8b4b. 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/USASN2220072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93a4fa159d859bc6383fcf41d36c070181375af4b8164ed39aca1f199422a8c. 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/USASN2220073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88783a97d9fc963d17807ea6f4662c29616fe8995a8691527944962a4953c650. 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/USASN2220074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6da493ff374a343dd32265008bf813b7bf8067ba84afb29f5239196e62d2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USASN2220075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ea21e92fafc409a28eb069440613c6ba5be8c3509c188d6a545e29d8ca364. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USASN2220077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155999db1ed6971af50798c37dd0d795d5e4401f5d1637091817921e4e40beec. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USASN2220076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc8acc65d6b9958fd8c9e4df69260e039a7894077c8c9f1ccd2a2aabe45c2d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USASN2320317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcbdd419e93a11ee7f9324d94f6034a6e6752bb2eadac37ce2e46b946dad35e. 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/USASN2320140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc970d2c24a85f57d1e632e24c2e5d52faf52f014b10c141db1fabdbaed68ef. 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/USASN2220798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc7260d95f1978672e0593061b24789d07e786ce2bd3c3532a6b8b615ecd173. 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/USASN2220546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6948ee7e36c33fac9563ea29988f13304db21e227d8fac8811d67bfa08c74f. 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/USASN2101037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d1db29e656e0190588c63ed8ae27eb947af4c8219cfa07678855952973f334. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91913270.