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 0x62f25225a69ac1fd5de4414af3e679055b5c6ce841b2a06222646e25e27d1180. 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/1784d862-a507-4b56-96ad-f8757d3962f0.json and https://artists.proofprofile.net/proofs/artist/1784d862-a507-4b56-96ad-f8757d3962f0.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 0x6b4b6dce58afee965e21188264fb4f959b359ae8f04f9717de5f49595773efdc. 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/US83Z2224193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda97bc4163288f62381aa03d0ccff54912ff8d526de79bcd8dffb14551c514b. 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/US83Z2492520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa864d84574c8d13cffceef835ee71759e28691a3eaa82495e902eaef80c08a72. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US83Z2483062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d393ff11ffb76a3098a0db567affc87d8e6360599badf6cf47378257fd6a6b. 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/US83Z2325678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed46c840c9ba5dc54528933fafdb854cfdada8fef00b3b10716dd73ece3962d7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US83Z2317830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36004d1953fd4ac412469fea1aaf6d394c449235cc98332fcb7a3ecf8299db6b. 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/US83Z2303825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445444228a22a1d0b95bd909e9c74d70ad2b7ed764c00c23f29bee3fb60eb203. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US83Z2240981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2de17e9d7a9954be262c863e28aa5c5e29f09d2c450601319f696a25f9af95. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/US83Z2238354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf5d1f31ac98c886fd9ad746224f9f53acff94375ea455f5e2941bc7e5792af. 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/US83Z2235686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cad579423e369b43c6ef24538c099dab39c693f511496caa604bc078cd8672. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/US83Z2231271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed37dfb79d6d72e3826a86c4a77cb8ba310536d64a8e6aaab5358c7b6296044f. 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/CA5KR2229384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d92afc3ff609bd512084c0ca7d7bfc6c4fa880047403ca8058080194f7399b5. 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/FR10S2240162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d06fbcc7954c2545d5bafd1941a5bedd878d4b5e0d6f8cacd01ca044ff1f5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX202142758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b47fa2a2eb42ed73f418521ac612afb329d320ce4df5693ac90206eb14b4d52. 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/FRX202142760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c722beecf0b8e178dba5faeaf954849b98810daae3cf5a172210de45bea02f2. 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/GBKQU2070686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d66bde1f53b2e3575e57ef0563e148dd3459150c515f0b906691a00716ff3d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6DC2075817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a069558b5fdcac900c8dc24fcd3abefecb9c711245921c1e2e85aa40a1ddf. 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/US83Z2005162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa919efa698ff145c3524ffa46ccc6411f476f4256bcfc4a43525057e50e22001. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US83Z2005163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b200f5b8d9c80d8320d4b2f17284c77947733e09c863a210a810ba2094bb6ea. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKQU2008712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1377b9aea934b792c2305abcaf292a2ee0403d4161d2c056d16ffc83873bf7. 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/GBWUR2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a3c5839ebd1c4819e44365fd2ecd3631e88aeb0c5a8f49e4121fcea1f1bd44. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEMI31900270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d1a63c0b6182406c527901e713f9d8ff57a95f6caeb03609857f0398574276. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DEMI31900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb3ef3e4b1026264ee2ca8c8664983aa7f36d6974faeca14731bf9767be7520. 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/GBKQU1996219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5867f7b0c9b377b08118e6ae6dade086248a764474dd154018aa1e2ad5873372. 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/GBHAD1901912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8cdeafb24eca90baea23721f492a3a6fd75166faff6cd62ea938765e0234ba. 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/GBHAD1901864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001eac6aca043ef09501ebcc04f328ed6c2963a68015412d6dcf3420df093ba0. 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/GBKQU1903202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65b79d68422bf3431ad9043e6521abb72cceeaef0def7ac13a7da096b780dc8. 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/GBHAD2002243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65de73d6d11aeb41a2e3e74a45606c17563b9fe32d09425b4bd0b95aef7c72dc. 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/GRLP11901644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0697b46611098507ce52d20f0b2a98e2c88b7c8b6ee652ef247ae510853c04c5. 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/GBKQU1893999.