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 0x2a1879f1755cd7933c58bd254add59be93c41d6e95319c3fcba24f3e5aca136f. 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/fb79b44c-fd42-4628-ab9d-4983ae4446e6.json and https://artists.proofprofile.net/proofs/artist/fb79b44c-fd42-4628-ab9d-4983ae4446e6.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 0x4d135cbbea773c05a6f6207cce93986439b52bbb6125253f7f684b71cc62e17c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM24S2100668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859dcd26b96314d518c1f57b470def31e2d7a661cede799457d1662f89a15308. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:25Z), 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/US3DF2292725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522046da9b6b0062b78af61104e64bd8d5fd228ac2630e6f616cf99041f5affb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM24S2206797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aae27150c25ac9657d29009791f94b147166073c4b2785b577a9b76c31393b3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM24S2304584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd4b3d4e2f67563eb516986e8b6fb654475de65e075c79057e822d2d937d862. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:59Z), 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/QM24S2306004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd972e8feb7d823fa3c80521b0045b1df719ff4112f82068f0052ef05425ff76a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM24S2302025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4be9c53db00a352826a7582cb450a717c139a48788bf3dce2c4344ddc79dcf. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:19:00Z), 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/QM24S2307950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859dcd26b96314d518c1f57b470def31e2d7a661cede799457d1662f89a15308. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/US3DF2292725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f080c439e91d3348bcd6254cf52efa4c255e98286ab0d57c09b17ae82f300. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM24S2307949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c6c6587d274a25a8b150d142de8d910876de24fe04108702d9ce1adfd99037. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM24S2301159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce04622083b4460105780aaef8dac672f8928b2d269efaf9aea624c021225150. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QM24S2307946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aa13c8b2279f00fa9fe76ec0b82d9571ae4d95e807b8ef8ec16d709e7d60b4. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QM24S2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1b1369f35c9fa9cce5314032abdc44fea6cff56c386c270ee293872b3f8b4c. 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/NL1LE2202660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a8f53c46a554daaa962cbcfa3721866d9e1c649a45b7c8325240319e90edb7. 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/DEQ022391774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1488a4d901b8596879de69bd48735747ab8e1c9212f2849a60164fff11ef5c0c. 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/NL1LE2101980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d0cc2e6f9c3ef0b3d54aa6a5ae96e9581b239741785df2b35762b248813f7. 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/NL1LE2403519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80007c8135d9a3a5f4742825ad64d9c85c308adbdedbf31cefe04263a9bfc7f5. 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/USANG2272265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e26dcf7f4b34b1d880fe0661238fecfa4caea70707ee73b47c63a995f10b69. 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/QM24S2304981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aad917bdafa88b3d420d7e894a0706f87f0c6f7a72b974bd1e1b3b0b3070c8. 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/QM24S2303019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1e61060d168d111184e224468378ec49053bed40e5df85eb7675a91ec4d94e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM24S2308704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9327773d7fc2cbd70b77634ddd454c446bd0504805451e58f2267d05480a33c. 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/QM24S2308706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed427bd558ff21ab1bccf50c69e97c5c52b366382b62eb66be245ddff3a0880. 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/QM24S2308609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b01f65e3b630e58d485d946a0929308d3fb3b73fc86331afbed978cbb46edc8. 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/QM24S2307187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292ae7800c875d18fa389490107235940f4396f0d75ef68d71468679848d4922. 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/QMANG2250338.
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 0xd9d52a069465a8746c14ee9e24360fefbd56fc1a6967a2453a78e222f9745484. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USANG2263970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee805e0a8f4db767f77b1795a7f053a8e96f5c876f72fccf3341e9638af8a97. 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/US3DF2406047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffe49cfb4e2fd2af08c865887e0d41979b63ec0c882899ffaea84bf57fbb2a8. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USANG2229324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39826c0f2dd8462911967b2de7054572176620c59fee6bd8f78f3c936a29d32. 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/QMANG2250345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29115777d89f812d584a1b59b78e76a3ab14634f99f462f85938a283a2ba5795. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMANG2250348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a697b0607bbb8d00809905bf44a34822577d376446f2736b14c503de5971acc. 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/QM3DF2268670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19c741469c9e9892605f425def1ee6427d2c29712a8777f94b6b27f87de2dc3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMANG2250326.