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 0xb1bcf1efcbdfa114095999870c14fc8ed9080a912a40107e6b0e2cab1711a9d4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62f35af6-3d55-4333-a63b-8fbbb2737b37.json and https://artists.proofprofile.net/proofs/artist/62f35af6-3d55-4333-a63b-8fbbb2737b37.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 0x501e992775017c1bd424013f7b2cf62d6bfb4433a9c1caab498ca002fddd78a0. 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/TCAHX2410422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f886df20f70187a817a66257be9ba614e963364a7d0f3a57749a3fbfc15cbe6. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCAHX2417066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42097e1287e270c0b980bef7768cf913b24dc7cdc98b819164941d1969c95ab0. 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/TCAHX2417077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0709c645279fcfd4d36c2d768eca9cf81b3d2b12e5e59c1cd345c7071ba08. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAHX2417096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ae6213adea7db41fef47a2420b9cc5a39f4cf06102463b26156ddbe36fa75. 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/TCAHX2410285.
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 0x686fc4eba7242769d666532cdc8db5f5a91973fbe781a937ec1deff694c2288a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCAHX2410380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cda7306ae8316f89b2d6d128e4fc779e25d61e2af901cd4f7616fb60fce796b. 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/TCAIU2418250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116bb0782e9a07b2599933f63c53a528f6fd29cd91def3d6eb1873a3648366a0. 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/TCAIU2418258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5971cc8b94a6f34c170f7679562caef1f8b0968bbef241d06e71fbbd080b21ac. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCAIV2418266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b916fb4548af79fed41b7d23cad6cd882e9a20d5f710704b169ef50838e135. 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/TCAIU2418288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69392fb9f8d3b77e152da4ce0e98f9cc03a4de9533a191617cf13a1679b4e4e3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAIV2418279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cbf4ca7632efda78d60cfcde4cc60c9d200218cb120bdb952951b246edae90. 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/TCAIU2418301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f79e53b0ded9a017c26aea3f4f92303a81d4cda2c072f8b3ef108c46f2ea3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAIN2496194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e2ad725c4c9f67844f605972dc83a429d1c2ace30f1f00c641658c9ab2b2ba. 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/TCAIN2495901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c7f3ebf0806bab292eb0b7656a629fa047806cb859a8ad619196945877fd5e. 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/TCAHR2398182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c5378e9a615b73dbc50ab0140b875f5c536488e0f976ad7365e4cbbcafa084. 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/TCAHC2367392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc3db528646db80caa6b9fd48b454bf919757ed34431f9465131c010d042e8e. 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/TCAHA2334861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab5493ee51254b9c0a3e9f5b2b09532e3ae3934f2b7ce154203e177411841cf. 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/DEY472278133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50aa265475c99891671a0b3071de90f97a7c83ebe3eb25fe2f83757918a4769. 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/DEY472274980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ce9100218c0ec186ff26e62a796ab5d07a3188bbb379ac48423b90b4bd69f. 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/TCAFW2128714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe457f9bdce20d659b0a46b659870c7c7ccdd1c67932cd53d792aa1e177584ceb. 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/QZNWT2340247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9ea0b36e0546d4fdf2b94620a5ab11e1182d42cd7c4d1d6c0b6f61dd5f92b2. 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/QZW9N2218010.