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 0x8fe0eebe4f9fd4604131f247a9c1cbf1ef74b55f3774b7e5d1b2a3ab1d673fa4. 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/98f78596-68fb-463f-ab4a-ada8eb61c8c4.json and https://artists.proofprofile.net/proofs/artist/98f78596-68fb-463f-ab4a-ada8eb61c8c4.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 0xe3dccf0dfdbec48daf8d193bb724318cc92e318c8296f9a756da23f862632d05. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:47Z), 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/QM6N22285479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8ea5ed4500420ed2fcfd6248e3cfae052c002b9e96385a937bf25fc4bcf291. 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/QM6N22285486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe207a9a5749bdcc736a66a7e58af47c6f35513b64c11a38ef768a96e0889cfde. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6N22285541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2805a9e24460c40b67aa40a87e5e5d5b4ddab1288b028c98d341063a7b7e3816. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QM6N22285542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e62caa0e14376e0634f79d144203d086ebe52ec6ae62c0aef5e96ad32e7ca4d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:05Z), 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/QM6N22285544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a5a082117dc95e44529ba41113c1f3ebe10d432a47f686f47bfbeb9f8ac59. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6N22285555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce82fcaab32576dc753918aa16882579ea09303c7cd87e3e575873e4b4385ac1. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QM7281400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5075b27f5ee4cd8406825e36961505c9e1da0acfec0665d3b3042b5b87c791b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MRVX20109412.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f65cde47a43558ff94fd4eb058c2c5d5e39b2e4ecfc21ce9889540ee141c44a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME1470991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bf52ab7900311c1642f8a6e8b8c6f57654b184c08f0fa6c7e631155bc2a19a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME1470992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713e53dff3b0009cce8837b560dbf97d13497c0de3566f3e06c0fe286d9dd848. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME1470994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef08859f93cf9518e29a6086b96d789574e83b1094cd90fba2583ebb0416078. 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/QMFME1470997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbfd529fa0fd2e5657f74a2adafb7603bd3b89bb6d05357a6bc382298157fee. 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/QMFME1470999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6869ef221452ca6a7f8bee48cfaa48d8f64a7789bff2946a5403aa509080a0d0. 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/QMFME1471000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7b29818cbbacbbf7c2f29c5b392136d8178230335a17834efe7fbb027511e. 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/QMFME1471001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63161d5d146be3b3a31a990132f97b2c39f38e8552dba41ac1eaddd93032300c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME1471006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6825e9e8073804a6c568615afae731ec9a199300a031b3d69fbe1ebf4c6a2e6e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:45Z), 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/QMFME1470998.
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 0x920fd27db52fca609cca4e3e9140ec42dae83aa3377c90b8c2f439de32d13f39. 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/LVL151900729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804cea1f5e53e0d0d688b4d4bd2cb98c90718305d5123c09adc6d96e1ffc935a. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QMFME1470990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a2abf2c9d3df2fa150f081c076745b4440eb8e394c782c739e1b9b4a72e72f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QMFME1470993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0ea7b975895ee4bd30dc12713ab30854d1f4e17d74510e1ba4557f4f3fd9be. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMFME1470995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d96b4cacf4ce7168308dd0ee5dd995aaa2732aad290b8db1b793aabb30c8b2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QMFME1470996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3f702e4b91c3584567676f348cf132fbcbccda496af8c2faa5c13a0b40edc6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFME1471002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ac3a013a44ea421e06f36e46fcd0ba1e5a0544bc61eb752f4305b679b9da18. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMFME1471004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2865fab330393d310a02bd8a4ae4d7d8e0f144c30a080f8f520d368d28cc06a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QMFME1471005.