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 0x8260e11469da4afa658f1950c50eae101c8e6eebfd4f43057e66f65eae65efd9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7176557d-c4d6-4c4a-9359-50ab12dbdb87.json and https://artists.proofprofile.net/proofs/artist/7176557d-c4d6-4c4a-9359-50ab12dbdb87.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 0x63b2ca90d7fd6b890164fec02b198415e0710e2820bf258ee7d57d221bd00dc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1549378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e783c94f26fbd0d7c8cd13c36bf9611ad7138b944e270fe682ad3113a39425. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1549379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad25719fa498b74716c7800252507c985d794661c5a1e62045ef637f2454e9f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM6DC1549380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b96013a7e8501568f4c3a2635b575f50e1db30c389bc62fd01edfdd98708c0. 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/QM6DC1549381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac47afeedd3734f68d6d278ef9ba7f896b9c9317e9a22360d92dcf69c417b12. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM6DC1549382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565a09bddb0b519741386ad4c20e142cd9dcc41b90a0241b5e03bc993086a62d. 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/QM6DC1549385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af90ef69901c54fc4d3b8f59f96bf1a1c01ef0ed2fb80d024abe08d25cc76f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1549386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee2beddd2c0551c877f606fc373e21955035b25a77d804e478a5910deaa861a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6DC1549368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a12e6786bd3dc2e06bb6757835a7ae47d7b4a5d5fc6c1ca46d0d9d25b413c0. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QM6DC1549369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2283a0268dc78545b192906422a003044f2144a6b502ab22ced1a0f9bcf11f7. 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/QM6DC1549371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9209abac9d3d511fcff3e7787522c5fd3faa0ae7de02ba401deed84561f8db. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM6DC1549372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b20bdf77532c60b4fc41a7d2dd862b8227bfdeac57939fb4f8167718eb18ec. 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/QM6DC1549373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5349caba46a0d72c2ac84761534e3fffd115f0c04220be90a91bad06d2015997. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1549374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb4b7cf706c921ba12cc1fc6d467a6bf2b14f53f9d9a6581e4c84fde3aa7f40. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6DC1549375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749dc607417b2bbd868635b23f6f2a5d58aaf8e64d5166c85eb6fbb3245c1b91. 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/QM6DC1549376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069fac88e0226ba6afe7f6d7c752153c53939cd1e7b836c06e5ec49461e2db9d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM6DC1549377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e94d5ba91dc81215dd65dfd93c7579948c9b418a11bdedfb9785f9ec727d560. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1549389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a794836e04a095cf56d6fa3ff27927f735b0c6ddad58f2e35c13c6eef510af4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1549392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc2a31f108d1085e84c29f33f441f6fad0e722b8cea16ee696dfa73c52c2383. 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/QM6DC1549393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944b8255f4e4d3f510ceffd044dcd0cee41e9c26ec09b05a84db4757d8bb428. 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/QM6DC1549395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad25719fa498b74716c7800252507c985d794661c5a1e62045ef637f2454e9f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM6DC1549380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee2beddd2c0551c877f606fc373e21955035b25a77d804e478a5910deaa861a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6DC1549368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a12e6786bd3dc2e06bb6757835a7ae47d7b4a5d5fc6c1ca46d0d9d25b413c0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6DC1549369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b20bdf77532c60b4fc41a7d2dd862b8227bfdeac57939fb4f8167718eb18ec. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6DC1549373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb4b7cf706c921ba12cc1fc6d467a6bf2b14f53f9d9a6581e4c84fde3aa7f40. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6DC1549375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc2a31f108d1085e84c29f33f441f6fad0e722b8cea16ee696dfa73c52c2383. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6DC1549393.