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 0xbbb7cb5568976c04a8d95622f718214d6b50709468afdcf4d2841f3e8190b065. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68b91645-6c35-4788-9b36-e1122be3e23a.json and https://artists.proofprofile.net/proofs/artist/68b91645-6c35-4788-9b36-e1122be3e23a.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 0xfe613bc22afebe53ae98ad7e232cc5adf216a321ad22c2a72ccbe82e69aebcf4. 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/USL4Q2277001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7473a8a2ad029371fd4f2f20992a6977d03e97d2502f265ea32863cd4b54f948. 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/USL4Q2277002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17062d1ee41ebd8edfa23b94be6f6e0fa71f7a62e9028f5cbfb37b444a0eed06. 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/USL4Q2277003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3acca9d5fd346c2913933985fa352bb6fd589f71140d8ac30f29e615aea470a. 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/USL4Q2277006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b450dc9558fdcf8bd3d8561c17a0ac2d8e70b03ffa97bd95660acb0076444f0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USL4Q2277007.
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 0x6a4175a43a683f74eb3479f0dd74456c23851f9d6765da186ddbfadda95b2ca2. 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/USL4Q2276999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c7aa8422531f2e30bcf3f63ec68d23ecd068298d80422c00b5731a90e170b4. 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/USL4Q2277000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b36748b993c24cda8b82384cdd1aa69b5bb0cc44f89f60c39087ce423b32e4f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USL4Q2277004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c35fc18c3be8aa291b2a29d0b3e0172e7e55f316101b195bf68f67788f3c3a. 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/USL4Q2277005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38b452095715b9d258b1d8c834d2b5defde2b343b2fbe692c0e23a0e1c54cd2. 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/USL4Q2297360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0424821c31515f0b9aad7916cb998997a4dceeebe1696cc6c3ba641cd4a5879. 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/USL4Q2297363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755584a325c3a0555b7db1d984f0563b0d730debb200159e82880b6c93fdbb1a. 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/USL4Q2297358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aece2e769a4cdcd245f410be5def759877ac2c37574155ee58c32550f0568e. 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/USL4Q2297359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541fd1a0077b1586e93fa98d61bc74f305b369bce533fcbe01e156bb5d75d6fb. 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/USL4Q2297361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1629a42dade13abacfc8ac9569014f95d9d427122f254355340d47f61324fc8d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q2297362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f8b1a0ecb33cfffef7af060c50396ecdeb0060b0069fafcf142036ed7c6dc. 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/USL4Q2297364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45f7b6fdd9adfca2527ddcc7350962526232bbda85d3b6dd5d3381fbdc3314. 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/USL4R2214984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468044a467b05dde047ac16ac233fb6f584d5882d5ea9755a923a8856201ebfa. 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/USL4R2214986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075d54e3518cd7d1d80dd03c765d2f9366ed3f4050624919dac3e58a3918d89d. 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/USL4R2214987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6aee42046073a0a3c95a42c478f1826dd56a25cae55bb08287b20e5af8fbb9. 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/USL4R2214988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f47b8e1eb47fe3acbbd509a1008939dd6f5ed34ea50de12b646fcc0eda2c48. 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/USL4R2214991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ae52f42e924e0c81a4e658f42f5154922bba05269818ab18da000dfe32d81b. 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/USL4R2214992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa518d138d0b58e35d7dfe25104af3009fb94385d9a665ebdcf65ff941a4cfc7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USL4R2214985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb19a5f97977fe03e367cbf2903d4b61f70916f2331a2428ef53c53aa85dcfe. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USL4R2214989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42220c96564f2dd5f63fdcdad25a7fe139964d83dfe26203401040fc45ec8e00. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USL4R2214990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71ec44195ebf731ddb7ea3dde4d781d76b0af931593cb450b0ff99e7c49275. 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/USL4R2214993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4284881683a3b003d4baec42a66d407e663b0073333355f9a887c3a2f79ed47. 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/USCGJ2534476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa4fe16ab33f25488a01f41f5088ef913ba18c638c1636964890190ba7f0f47. 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/USL4R2498073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c42ff8ea17888c94d55f8f29c8a0997f12fd90b7b823f4988cca3a8a533fb0. 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/ES71G2410834.