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 0x8abc48031ba9d352345c045800c291ce9c8e65e510c0a7f2dafb6397ea15e86a. 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/0fd98a3c-c637-44ea-9ed9-8d8e51c9be13.json and https://artists.proofprofile.net/proofs/artist/0fd98a3c-c637-44ea-9ed9-8d8e51c9be13.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 0xefcec780dbb4880f357b155fc4c6103bfdacb88ce02bbf53aa699c6ce6c57468. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:01Z), 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/QM7G91614992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e80f8e4a4bcb3804ff57071942645620dd701e13388f9fecf24d6eee1b3625. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:50:09Z), 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/QM7G91615523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05cf43bf435c52f3af3af1c4cbac795e571bb4354ca0c6574fb325c909f6735. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7G91614458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22016a4be62df348fed4c3fb49029ee1156a523669a71e2ff407c584488fc19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7G91615131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7e8fe9109b59013f937f3b562c1d104ae3707166f6d71c76803223cd560d0c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7G91615173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73659cf0f8a4e1c4e1121819405bf676a2ffe281aeecaf0a1cdc67f1028b8f97. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QM7G91615017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98c07fb1803bb56020dc858c333b2cee42ebf5fb987b30f2753460e8f6f5b08. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US66W1800395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8758e09aead01dbb15f58362862f493ece950a1b408cf65d55c2f7e1efffbad4. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QM7G91614585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127f73f380e5539e69965801b754f749fcc61cf503a6780e6893e7552c3d8392. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM7G91615221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c16634f780c03ff8a1d3c99f724c8f0a7adbd6cebbe0915151551ee8c719488. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7G91615096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b137fa0367e688255323bdf99c31b2229d0e8ccb6c185d490d36699f5d87e5. 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/QM7G91614415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20aa71f29affe9252adec983373476150254e7480ba8c99eef8f0a283ddb861. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:26:47Z), 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/QM7G91615099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b8ab495557457a2df4998a2ff1735b85a37fc9c0bbccc41fcdf52390b94253. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7G91615118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cb23ff15a9379360374efddad380aaa52ea682f04637b11bd43242d200d469. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QM7G91614408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e41779a79b59a37998c303081df575253d311706331068ec45f4b5113507ea. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM7G91614767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2cf4db89c5d02f5fa1f168ed2add564a8b1a4c9015e5e64d2fa26e7a12d15d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7G91615549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a3c962c81389d9294ea88813c04517099572494efdd0fabb56e7eb5e8b8f2f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM7G91614876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9a6a6a9b08c29c6c39fd952d22a9775f026f1a14e5020fc48c0c0aa1388875. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM7G91614638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2577c4d1d273aaf0daaaec02a13d9c51cc89e0d8240015c93967b070d02ff0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM7G91614715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2198ecea3dd51b367e5d098e5322535f07b6024de0ed92869f7a7f3d7a30b009. 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/QM7G91615148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eec6403c8d9564e8f7d509396d82c20c05c3923725bd5e793e7cec30ea97f1. 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/QM7G91615299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb66c0f27a76ab1249d34aea6942e30f039108562de708a29dca291683b556e4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7G91614509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9a369d5ce4c78c2566bf38b1ea1cd7bb8ce9a6f02c1d3922c36d04a93ddf0. 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/QM7G91615473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50936a0486f5d54d24329af25fa6555b5cfa7d539ac5589b71849ddf0d8ad6bd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM7G92000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d75c893b96f7b76f04c9f508cf884466d7166d21b7537936da17cf2a0e5eb7d. 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/US66W2100722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dae36b7aba61a55d68726469717c52d127f8303a2f8c6fdbd2f44846dfaec7f. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US66W2100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5485aee911c1f1a3123c432afea6285d95b484c256e3dacda27e5dc7c739c42f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US66W2201171.