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 0x3f6e01d741d21983e60cfc7ffe870883b59d0adfdcf1ade422045f38c1d058bc. 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/bf5f17fa-e0ad-46f1-be4c-bfb2d770e944.json and https://artists.proofprofile.net/proofs/artist/bf5f17fa-e0ad-46f1-be4c-bfb2d770e944.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 0xb1ff97f83ca1d096645f96d5f589f9590cf0027b499a476cb639e2b471d97e9f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USSM11708300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3269a6d8ecc7360f2311cd494bf0d7fdf0d87b8efd07d3a17481681743054e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USSM11708299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9561c618ed937d2a4337a3f0405cf2372ffd84a24e54f0d6180976a0e8ddb594. 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/USSM11902270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f14282b02bc519551ffd0d2cae3af1199826e04f27fd9c64460cac28119ef6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:25Z), 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/USSM11902272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1908521d3b6f41d60208f0abcab5afe443d9676dd8c6bd72764a20ea522b013. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USSM11902273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8b67a00edbe1367abb68d870203d9ca66a642ae34b43dd2f574df68b4ce961. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:57:46Z), 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/USSM11902275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e2cf757c9f0173ea9e1ff6051ba47485769081194c734b93f2ab1b0ca0a82. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USSM11902276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbae2923e55573fba6a3d78fe6cf9b8ed27f363e9b2893c7f8ee33baa6d71f. 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/USUM71819661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f01ba012393b9a5f3bbda1edac829bd31deb10404596a66e6bf98e92e55ddc. 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/USJ5G2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc7e56fd5d685d86348b7aa64267b7570c083e2e208c795ffc0fbcd3b04674. 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/GBKPL1948196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b33ddc8e71f9239d31d3246406633d8e89c9c2e8b5a2f80a716975100ec2fe5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMJMT1801969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139da772cd71afd84200d6bce6aa546a14400a4aac249404ad817e9ee4e6d0ae. 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/USQX92004274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ec4369ec4dfdc4b2669f909d0f9655d7e017aeb18e8c5d7c457ae90a55c2d. 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/USUM72014127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbae2923e55573fba6a3d78fe6cf9b8ed27f363e9b2893c7f8ee33baa6d71f. 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/USUM71819661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbae2923e55573fba6a3d78fe6cf9b8ed27f363e9b2893c7f8ee33baa6d71f. 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/USUM71819661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83695540a54f8ff61af4efe9e57b13a94b8c01d38e09aa32dd593247cea2393. 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/USUM71905040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d71f065952a0b86d2fb3e24cf00ee48d16f7ebd48daf18cfce9515a5018b412. 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/USAT22302678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd305a087c0613d228dd2da77656c431839933eec5b84f1718ab0ac5160bf8e. 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/QMJMT1902301.