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 0xe036d45e839d975e657d07edb7652911c175f386a77db66b4831d7e3fa270f87. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1a876e4-c544-40c8-ac44-b971a2d95eab.json and https://artists.proofprofile.net/proofs/artist/a1a876e4-c544-40c8-ac44-b971a2d95eab.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 0x73f8508c215a4c441dccbd079b04a09f6b199208e819d6da08cdf4c93c95978e. 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/TCJPD2573740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9523c418f85bdec754ef216e203609b3454f45bf49d3acd29702710a2662652. 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/TCJPD2573742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cede87120ff9f32e450d672a3139d470887436ba25274f8313e5de342f9cd8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPD2573744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadfb2939236a5bba56bf92aa97de119fe66766a3f5c2c9328ad5fa51e869843. 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/TCJPD2573747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12482fb4ff691796625887c369d0d5656c7f0884a4718cf1718d1919e76f019c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPD2573750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165e31329c2545bef365aad376a5b7b9269c239ec195b3c22c65d29d490fdffa. 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/TCJPD2573752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d1ff127fb340a73ac2c4b29dd5e18f87f876230159c11410c2f24a3dec24c5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCJPD2573754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c69a4f2d353757f7dab431f2dd52b8eee7d39c9511e75f2a27c2e61597ad26. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPD2573757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed98838798281453fdc07213d2e767b645a6de14bdba75a034f0a6a2850ea6d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPD2573761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f17a1d2ac146d1046cf1ed19919f43563edd3df2fdd81575c8dde4ff3d9265. 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/TCJPD2573766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d14e8704199a69c48c391d96b67e515775efc2285f550575a8f96e990700e58. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPD2573768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3e33de4964e6f36ef8eeae02d2acb8652a7a9ba4f26076a2a7f8c58e9fd465. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPD2573835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f42653c8c371d5db7e2a15750df00f96b357dbbcbbb28605af2978c21d24ae. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPD2573840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378179d1a2ba1df0fe3a158d2184ab65e164f8df9957adcd2e4e7f30bb66957d. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/TCJPD2573842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34364e89024a7fb30b795f4658ac3657959473f1249b775e09bc3edb1e2bd456. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCJPD2573846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec7281f82fed6743ff84b9b11de36c24b4e22bf0994bec17910a325b00c637d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPD2573849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cc075443780bf0c1f010bdd2c3b73c4d2d6f7a2af3e83640c2ea1df6ca920b. 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/TCJPD2573851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf838e564fa627c705813cc3090f47e81d84b94f45ddb924c581226874ab07f1c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPD2573853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06884badfe02aa2e04bef8cecfbcd1f7d333834b140efced52af6b874d452cd. 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/TCJPD2573858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16096c36ad7e37882bbd22fbf79e0e2a0d6e9d1df8e1db191b93cbd0e091f348. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCJPD2573859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae950991981eefe6cfecb351010a46bcb7d8a11ae9dd4cd2eda97a04e5cb66b. 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/TCJPD2573862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dab470d5efb8f2cd28750aa4fb5ad53453ae44ee671a6f295e8436c9e7604f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCJPD2573865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517548d8fc3095800e6cc1d22074c19eba3febd96d0cf19bf85753622d98abb7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPD2573692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6bb9da1d9c9ba4556c618a95381b3bcfa07226b0e58e0591d5d611778a97f. 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/TCJPD2573697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa865878294358cf2e9eb4625e21905b7e6311db5ee98fa89274b905d7904a3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPD2573701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0ad5ef680ed96bb32864ceb79d8176b581cc371d555a3624fa38294deb80e9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPD2573707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82b7133f52ccbb26057a33910e86f6c9b6ebc53c63e7c4a7f9363ae716056b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPD2573711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb2737383585dcb30c2f9f4e48b09ca11b0bb0afaed6e9ff8404c1524ba67b3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPD2573713.