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 0xda1cf08b75ed1d346b23c2fdd01629c184897feb19085543a7ffc713aea9b669. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d95b24f-3ad6-41a8-899d-bdce7c9a5c6c.json and https://artists.proofprofile.net/proofs/artist/9d95b24f-3ad6-41a8-899d-bdce7c9a5c6c.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 0xbbc870218bb4e327bb5ee6c97fb97f5a9afd857b5d623fa2bb227665432ea4f7. 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/CHB242313295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec1dc59771e1b9b8a09c506812244d596a6996a22025034b3ee65b0117c17ec. 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/CHB242313299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f240042ac83f9eb628ce63d6728cd207525ead8b8209d68cb08deceb79c6234. 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/CHB242313303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a33a843b7ef61fc78d93fd7fa590e6baadca87c7aa3d8390d03b74c182352. 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/CHB242313305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3492fc32b3e1f70281938f990245c2bb9a7f5407774b8eac0483ff787f1a0f51. 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/CHB242313306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65389355d73f2fbd11be9460951ca6a786fed75d8ebb5de754959496253c3b02. 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/CHB242313307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e830af4eec16a5881b210e7fa6cf971895e34438bd8d27623d0d59e7503ed8. 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/CHB242313310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900cdcf3cf1ac1b3a9741fc73c45b4b469d0071d842aa59f864b123e73695102. 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/CHB242313312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afd8f961dfc32324b842158d34a58d8a9e25bf7d05a04c6ac3012a448fbabeb. 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/CHB242313313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932ede60b901cbbbaa6ff15c48e4fb4d33f10fbe08827440fd7f263588dd7a3. 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/CHB242313315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abad823f7d4895c7a0d76e3f5f92d9f6cf30283801c78c650eaee2aa4b345fe. 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/CHB242313319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b456ca0f4d363f967af97b9d095ac95ffbc13b87967d4d4abe29584750d375. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/CHB242313296.
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 0xcdafebf221110e23b87d349bd5f0745aafb1288753d6247248d6a38e3f5eef70. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CHB242313297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a275ac950547b40d88aa36abf9846c93779611822804aa9b9274bcb3a614249. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CHB242313298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc16d3a2c29eb6bbfa0f11a81fd360d20bf872cb562f2b2eb18ce33e007452e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CHB242313300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b790a58368665ff63def16777b345d840c299b5f71fc2435b31da7ea4c7202. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CHB242313301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd15a9eb0cac027574226504b3e3208cba1041674799f9bd4641621f4684087. 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/CHB242313302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe109b3c5ed081a87a53fa2193492ca7893d55fb2661538b0385c183a1c03b039. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CHB242313304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf60e8a8f99c7f8d71c59e5ae52cfd8056b5cc11dd1a10f1b4585bc1223588f7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CHB242313308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab280b3081183ef62f001bac1de1c9f9b1f9a2645472c6479b0c4034d8d81f5. 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/CHB242313309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a30c9be555260541dd87f18f56c903e5cb1dc10d7e496efe29c284aead7b7e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CHB242313311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7986922dacb1c0177e990d53e513c54caaa32c6761eec1922d7b0162376e7b66. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CHB242313314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2219b94502dfded6bc265545c1af56774e9abf2c4c6f5c37bb0a51767e4ac6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CHB242313316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bc0221c7ee50df040e7b09874e2a48baac2e1774a1fa3a383788939c97a756. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CHB242313317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672c0e990701e938304f55dfab64ccc9a32eb53de5e78d30ba4a7e2320fb47c7. 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/CHB242313318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b08ae28524da114b95d5b72900a8e68d71c22c420e47aa8274906d670b64be. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CHB242313320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6026ce20073149a9843c5f9829af153e24576abc1b6049984506ebecd42a8762. 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/CHB242313321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7165c8d2fe3e0e3df8dbb7c14a68139889adc9f5d4703e84d871a094e22140ce. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CHB242313322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c61d1e71616293b7174334978161b042f5a3a158d83d699a3980f5538eb64. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CHB242313323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed563ab486658d4c685c141d06db508e5885ec2bf9d3b91646846cce7d718208. 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/CHB242313324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f01a0924a6d2082491f242a9d5a1365e70470f5cc02cc0b88875e69e2585ea. 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/CHB242011091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c79b362212aa8ea9a84a1ea9a7f33e268416f60edac25aff0a449dd3b5d6b3. 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/CHB242011092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bed7f595f2701ea89cf87ea25ad26c2823a9855ce531c7b1f37d040406cb610. 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/CHB242011093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe479a606148277ed845f5008949833d48300d374ec534a1ae8e3e62da9e636eb. 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/CHB242011094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5d3379e0d5cf970f7d295c7f2158959c6bff5b410dddb1835b0013d1384c24. 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/CHB242011099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552456b6e13883c0b0d0f7cf3e9513320debcdc33867c73bf04f5263de8d9654. 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/CHB242011101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670ffa1e3d86a117e83cc3c6799c0fc56ea417aade2dcfc79685c4b3f7ca0feb. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CHB242011090.