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 0x57484dc6ba1204916e3817fa8289d547b6cb745f62852ff633fee7ef6fdd8bab. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/123e723d-f85d-4d1d-b825-62e0dbdf577d.json and https://artists.proofprofile.net/proofs/artist/123e723d-f85d-4d1d-b825-62e0dbdf577d.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 0xe711621b5bae05f9417c409dacc39b1b13e92ae22d20a5e901ae749e1ce3e086. 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/CNZ331600370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87442863e71f3aadbfe6b183fc1b90840b6b6e8f1c8b0482d032c91bfcfc96ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNZ331600371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700aefdc702ebf9f3fe6075544d6f69811590128fd8b27d4cabf00238622f268. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CNZ331600367.
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 0x5e3896e6b8c65fa3e91a3afb3a014190ba28c8a661811b5e942ae34ddaa59842. 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/CNG010233402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b72a8ad3c08a31109dc60d3c5e28d4b580c7420a96130e4ab42480f7af8e6. 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/HKG732423309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca6fb9f057986579f1fd9e4012d13eb6732b59165f788bf49f1bd285b05fcbc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG732423303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f063a555aa6e15edfe14600e9e456903c8f61588f3e3e702ca90894cbe26c. 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/FR2X42237498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cddf901902a63c48feed3c43dc9f891a6bb07563fc3033df74e36f9e5c80b5f. 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/FR2X42237501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b7ddedf4c7bc4a8832bbec19c8a1b5060ddb1c2df689c21a9cde5e2aa55425. 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/FR2X42237510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72868d0a6138eef984627a69df9f70a506d475352190a69e0de0082424119c33. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR2X42237497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8d96954616b7f5e0668d6fa5501a469e8f939f853b30ec016bba395213efc0. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR2X42237499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde8a0d79e2b032d82275ed61c8016d9f45e3515ba3942ad1a7f4d6d6f861259. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR2X42237504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f9230b224cf42610eee7607731cd60cab391e6e56a777ca420a08fb1f214f4. 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/HKG732116894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b6b641672509115c13e543df3b29876419b06298d0e0f884e101aad891549. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/HKG732116891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9118109a6429375c0e233b7f937e14e83527390acfa202a2b3a351ddc947b7d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TX2161454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb376ceab39fa39135b6ff567aa10c2d0e458363ab68ec4e405395d1120ad31f. 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/HKG731857149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad9da4fd094d739220e08a2751ebd08a4c52f0b502ecd928d8910df21cb8c8. 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/HKD012393835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170ea12592d438fd87d9f9504cb31d0a49f917c9adf208eeb799cf3dcbce9d95. 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/HKD012392203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b9de6cb22e38ff0ada3c0c59f5226575fb3f81e24433d4e962fdeb4324f53c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HKD012393640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e0b302bd5bab1438aefa0763ad5f43249d01fb978b0a1b73925319aee4e507. 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/HKD012393800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae733232e19d14df39a13a32ef93adba77bb1f059271e87b76970486b8e709. 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/HKD012391369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e7004b3c329e3246e4479069b8686106d3bfcf6692d3d3a84f60f12f0d46d7. 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/HKD012392657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8957ca90f35b5d6f57b1b16fccd88bf2cd5c81596c737cfd7198e7a8f4f15a27. 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/HKD012394355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08506c6caca7e0536f1cd533e8cc5f7deb7c2816c2ca70524759fc85997c86d2. 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/HKD012396223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfa7d8be98c257a87ff6a99f0c10df9fb81c3d43bd8764a706303b0212fb9f2. 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/HKD012389794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f4a6fc7ef10373a788cea42a4f523e1ea0b27982b6efa8862238345db6a73d. 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/DGA0L2389007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d92da0be8051e558679ffad44b6de9b518b8f00e8456dee007d7647a18215. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FRX202278217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0c2ed35e77d86f0c740b88fa6714cc0f52197a3af9359023c5463f0bb66746. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DGA0L2389041.